My “solution” to this problem is quite simple and effective. Take a photo of the screen. Your camera will very effective freeze in time whatever is shown on the screen. You can then take your time to review the details captured in the photo later. No more worries about trying to speed read the fast scrolling text.
You could also try taking a screen capture, but this is assuming your operating system has been booted up and running good enough for screen capture functions to be working. This is something I did on my Mac OS X recently to figure out what iPhoto was trying to complain about. Every time I started iPhoto, a window will pop up briefly and then disappear. It’s just too fast for me to read anything off the window. I didn’t really care too much because iPhoto started up just fine anyway. But I eventually decided I wanted to track down what that pop up window said. (Mac OS X users: If you didn’t know, Command-Shift-3 captures the whole screen, while Command-Shift-4 captures a selected screen area or selected window after pressing the spacebar to toggle the selection mode.)
If screen capture doesn’t work… the camera will certainly do wonders.