are there any? For me, two come to mind right away-ME TV showed an episode the other night-I think it was DELUGE from season 4. In one scene Radar was on the phone with someone and was about to read a list of something and he said "OK, now hold on;this isn't gonna be easy. I slipped in some blood and broke my glasses."
And in the same episode B.J. is operating on someone and suddenly some blood squirts in his face.