A short time ago in a project close by, someone (not me, but ironically enough someone who has been hacking Ruby about twice as long as me) had committed code similar to:
if status == status = 1 || status = 2 || status = 3
That probably makes most of you go WTF, and you probably figure the author meant "if status == 1 || status == 2 || status == 3" but somehow screwed up to the point of insanity, and rightly so.