Does anyone remember an earlier skit like this?
A hippie-ish but level-headed AM is leading a line of monsters. Grover is last in line, but audibly marches up front and announces, "I don't want to be last in line" (clogs feet for emphasis). So the hippie makes Grover second-to-last, with "Fred", a monster who looked like/actually was Beautiful Day Monster bringing up the rear without comment. Not satisfied with that, Grover comes back up front and says "I'd appreciate it if I could be first." And the hippie happily concedes his place in line, much to Grover's excitement!
Then the hippie announces what the game plan is: to run forward, then reverse directions. They started running, but every time they ran the other was, suddenly Grover was last in line again. Grover kept trying reclaim his place at the front of the line, but kept getting himself trampled. "I wanna be first, I don't wanna be f..laa".
At the end, Grover appears alone, panting "Now I am not first, and I am not last, but I am very, tired." <Insert trademarked Grover faint>