Solid episode. Lots of laughs, and good premise that actually gave all the characters something to do (I particularly liked the fact that no matter how much he wanted to do, Bart couldn't cause any mischief).
I didn't get that vibe. 22 Short Films had intersecting stories, yeah, but it was also about spotlighting lesser characters. I got more of a "Trilogy of Error" feel from this, if it was all blended together and didn't take each plot one at a time.
Nelson implied that he had been held back more times than he can count, so, at least for this episode, he's a few years older than Bart.