Here's a video of me attempting a front flip, taken by the awesome acrobatics instructor Andrey at Athletic Playground.
Andrey used this killer iPhone app called Coach's Eye that allows him to take video of his students, replay it for them in slo-mo or frame-by-frame, and show them how to improve by drawing lines that reveal sub-optimal body position or technique. Really cool to see.
I wonder if anyone uses this for dance classes? Might be really useful.