not i. but my friend did a project on pseudomonads and aeromonads in faeces for part of the degree we were doing at the time (i got the good bit, for a change - boring, but no shit involved). the range of colours in the specimens she got were unbelievable - from white, through the usual suspects, to green, black, etc. the day she got the blue specimen, we were all hysterical - it didn't help that she was hungover that morning. oh, how we laughed.
halcyon days...