Alright, I've been searching for this one for a while. It's a pretty old one but featured Tim and Eric so it can't be that old. It's a bump that features outlines of characters (from shows on at the time) approaching from opposite side of the screen, meeting in the middle and exiting opposite sides. It had a mellow piano loop and the tag line was something like "Adult Swim - Quality Programming/Content" or something along those lines. I really just want to hear that music again.