The strangest thing I ever saw was... Back in 2008 at an Opeth concert there was a guy that looked strikingly similar to Fidel Castro. He had the beard and the hat. The only thing that was missing was the cigar. ... Same place there was a really skinny guy where the tightest black jeans you could imagine. Needless to say it was quite bizarre. On another note... About a row from where I was sitting there was a crowd of old people... I thought, "old people? At a death metal concert? This doesn't add up..."
Needless to say, those moments were quite awkward...