Saw this vid on youtube years ago, happy to see that it's still up.
Watching Olympic-level sprinters on TV at a traditional broadcast angle doesn't do them the justice. I have seen amateur sprinters during my school sport competition -they hella fast.
This youtube vid demonstrated it beautifully from a different angle, it helped that it was filmed from the opposite end of the stadium - a good distance away nearly encompassing all 100m of the track.