I've got a Homestuck one because I didn't read Problem Sleuth... yet. Maybe I'll do that when I re-read Homestuck (it seems like a good time).

In general just the whole sequence of John playing the organ, but in particular page 7086 where we get the [S] of him actually doing it. Partial bias because John's my favorite and the moment makes me think of Kris Dreemurr... who is also my favorite. The similarities are there I tell you!