This dog photo originally came from WoWBB demo. I almost bought that software, then I found vBulletin. Thank K-D (Kier & Derby) for the great memories!
Robin Williams explaining how golf was invented. Some cursing involved, so not neccessarrily SFW, but damn funny anyway.
Something's broken with the media embedding, by the way. I could not get the video to work. Had to refer to my local installation to get the proper code.
And while we're addressing stand-up, here's Pablo Francesco. Not the original one I remember, but still darn good.