Ed's paper bag is likely a reference to Faust, a character from the Guilty Gear video
game series who also wears a paper bag over his head. Dom talked about Guilty Gear often
in his rants prior to this strip.
"running gag" is a phrase I suggest you add to your repertoire...
As a random note, Ed and I used to sing this one rendition of Fly me to the Moon that we loved for its sheer terribleness. I think it was something like episode 8's ending...
"FRY me to za moon and let me PRAY among za stahz! Let me see what SPLING is like on Jupitah oah mahz!"