iNerd sent over a video demonstrating Chun-Li's combo loop against Dhalsim in Street Fighter 4.

Supposedly this only works against Dhalsim, but some people claim you can pull it off against Vega and Akuma as well.

This shouldn't affect the game too much, because of damage scaling limits how effective combo loops are, as evidenced by how little life this starts taking off after it's repeated a few times.