Cragin was a studio musician on Jonathan Coulton's album Artificial Heart, which Flansburgh produced. Coincidentally, Cragin appeared as a part of the band The Scrantones in an episode of The Office, in which fellow Mono Puff artist Kate Flannery had a regular role.
One bass enthusiast said of Cragin:
Hal Cragin's work for Mono Puff (and They Might Be Giants) is also one the most amazing pieces ever put together. His addition to their songs is something right out of classic 70's funk. Truly a show-stopper.