Though he's adept enough at sleight-of-hand and other stage trickery to have earned the admiration of people like Ricky Jay, Penn & Teller and David Blaine, performer Derek DelGaudio bristles at the term "magician." Anyone inclined to think that makes him pretentious can look to Derek DelGaudio's In & Of Itself, in which Frank Oz documents the singular 2017 off-Broadway show (also directed by Oz) that embodies his ideal: Here, the patter employed by some ambitious illusionists becomes full-blown