The most recent one I noticed was a few weeks ago, catching up on season 7 of Dexter. Dexter is talking to a convict, is out, in chains, trying to locate where he buried some bodies years ago. He buys the guy an ice cream cone, as it's really hot out and the guy will never get another one as long as he lives.
While they are talking, the ice cream melts to nothing, then magically reappears, then melts to nothing, then reappears---over and over again. It's pretty funny.