this is the somewhat famous "cute blood" picture - I'm not sure of its origins, but I know it is used in several animutations, so I listed source as the fanimutationwiki.
A while ago, I saw the cute blood thing somewhere, though at the time I didn't know it was blood, and there was a caption saying "you don't want to know where this came from". now that I know, I wish that I didn't.