Do people grab your kendogi, twist it, try to throw you with it, etc.?
There was this REALLY big guy in one of the dojo I trained at...he must have been about 240, and really stable. Anywho...I went to do iriminage (poorly, I might add) off of a lunge punch. Well, I ended up doing iriminage to his dogi jacket...but not much else! Ripped it right off his body. But he was still standing there, wondering why it had gotten cool all of a sudden.