Why is my screen flashing and distorting?

The monitor on my Mac Book Pro is flashing and freezing. Even had what appeared as raindrops frozen on the screen.
Had to close with on off switch, came back without raindrops, but still flashing intermittently.
Am I losing monitor or have I caught a bug ?

It is either resetting or updating. If the device went through the full restart and is working now then you are OK to use it.
If it is still on the apple logo you may have to hold the on/off button and the large Home button in the middle at the same time until the little apple shows and then release both buttons. This will refresh your device.
http://www.apple.com/support
This is the place to get answers and steps to fix many issues.
Good Luck

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    com.apple.driver.AudioIPCDriver          1.2.0
    com.apple.driver.AppleMuxControl          3.0.8
    com.apple.GeForce          7.0.2
    com.apple.driver.ACPI_SMC_PlatformPlugin          4.7.0b2
    com.apple.driver.AppleLPC          1.5.1
    com.apple.driver.AppleBacklight          170.1.9
    com.apple.filesystems.autofs          3.0
    com.apple.driver.AppleUSBTCButtons          220.8
    com.apple.driver.AppleIRController          309
    com.apple.driver.AppleUSBCardReader          3.0.0
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    com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
    com.apple.BootCache          32
    com.apple.iokit.SCSITaskUserClient          3.0.0
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    com.apple.driver.AppleUSBHub          4.4.0
    com.apple.driver.AppleFWOHCI          4.8.6
    com.apple.driver.AppleSmartBatteryManager          161.0.0
    com.apple.iokit.AppleBCM5701Ethernet          3.0.6b9
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    com.apple.driver.AirPort.Brcm4331          500.20.6
    com.apple.driver.AppleAHCIPort          2.1.8
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    com.apple.driver.AppleUSBUHCI          4.4.0
    com.apple.driver.AppleACPIButtons          1.4
    com.apple.driver.AppleRTC          1.4
    com.apple.driver.AppleHPET          1.6
    com.apple.driver.AppleSMBIOS          1.7
    com.apple.driver.AppleACPIEC          1.4
    com.apple.driver.AppleAPIC          1.5
    com.apple.driver.AppleIntelCPUPowerManagementClient          166.0.0
    com.apple.nke.applicationfirewall          3.0.30
    com.apple.security.quarantine          1
    com.apple.driver.AppleIntelCPUPowerManagement          166.0.0
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    com.apple.driver.AppleSMBusController          1.0.10d0
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    com.apple.iokit.IOAVBFamily          1.0.0d22
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    com.apple.nvidia.nv50hal          7.0.2
    com.apple.NVDAResman          7.0.2
    com.apple.iokit.IONDRVSupport          2.3
    com.apple.iokit.IOGraphicsFamily          2.3
    com.apple.kext.triggers          1.0
    com.apple.driver.AppleFileSystemDriver          13
    com.apple.driver.BroadcomUSBBluetoothHCIController          2.5f17
    com.apple.driver.AppleUSBBluetoothHCIController          2.5f17
    com.apple.iokit.IOBluetoothFamily          2.5f17
    com.apple.iokit.IOSCSIBlockCommandsDevice          3.0.0
    com.apple.iokit.IOUSBMassStorageClass          3.0.0
    com.apple.driver.AppleUSBMultitouch          220.23
    com.apple.iokit.IOUSBHIDDriver          4.4.0
    com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.0.0
    com.apple.iokit.IOBDStorageFamily          1.6
    com.apple.iokit.IODVDStorageFamily          1.6
    com.apple.iokit.IOCDStorageFamily          1.7
    com.apple.driver.XsanFilter          403
    com.apple.driver.AppleUSBMergeNub          4.4.0
    com.apple.driver.AppleUSBComposite          3.9.0
    com.apple.iokit.IOAHCISerialATAPI          2.0.0
    com.apple.iokit.IOSCSIArchitectureModelFamily          3.0.0
    com.apple.iokit.IOUSBUserClient          4.4.0
    com.apple.iokit.IOFireWireFamily          4.4.3
    com.apple.iokit.IOEthernetAVBController          1.0.0d5
    com.apple.iokit.IO80211Family          400.40
    com.apple.iokit.IONetworkingFamily          2.0
    com.apple.iokit.IOAHCIFamily          2.0.6
    com.apple.iokit.IOUSBFamily          4.4.0
    com.apple.driver.AppleEFIRuntime          1.5.0
    com.apple.iokit.IOHIDFamily          1.7.0
    com.apple.iokit.IOSMBusFamily          1.1
    com.apple.security.sandbox          165
    com.apple.kext.AppleMatch          1.0.0d1
    com.apple.security.TMSafetyNet          7
    com.apple.driver.DiskImages          326
    com.apple.iokit.IOStorageFamily          1.7
    com.apple.driver.AppleKeyStore          28.18
    com.apple.driver.AppleACPIPlatform          1.4
    com.apple.iokit.IOPCIFamily          2.6.5
    com.apple.iokit.IOACPIFamily          1.4
    Model: MacBookPro6,2, BootROM MBP61.0057.B0C, 2 processors, Intel Core i7, 2.66 GHz, 4 GB, SMC 1.58f16
    Graphics: NVIDIA GeForce GT 330M, NVIDIA GeForce GT 330M, PCIe, 512 MB
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    Serial ATA Device: TOSHIBA MK5055GSXF, 500.11 GB
    Serial ATA Device: MATSHITADVD-R   UJ-898
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    USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0237, 0xfa120000 / 5
    USB Device: BRCM2070 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0xfa110000 / 4
    USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8218, 0xfa113000 / 8
    USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0xfa130000 / 3
    USB Device: hub_device, 0x0424  (SMSC), 0x2514, 0xfd100000 / 2
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