Rim Lock

n. An annoying occasional occurrence usually only encountered upon making an H-CUT, and characterized by the bottom rim of one can inside a plastic wrapped CASE resting atop the bottom rim of the very first can you're trying to lift out, thus preventing its easy extraction.

NOTE: How high can you jump while someone stands on your toes? Same thing here. You can't fight Rim Lock; just select a different can to remove first, and bypass the log jam.