The first 2.5 minutes of this video show video from the cockpit of a training C172 flight that might have had a very very bad outcome.
They fly into wake turbulence that rolls them 50 degrees on very short final. It happens so fast. A lesson to be learned here.
[I'm posting this from the Amtrak train to NYC, and the onboard wifi is blocking youtube (understandable, but annoying), so all I can give you right now is the direct link to the vid. Later I will replace this with the embedded video.]