Barry: Dr. Katman?
Dr. Katman: Down here!
Barry: Oh, no! You're lying on a bed of nails!
Dr. Katman: Physics is just so bitchin'! Am I right? [laughs] Wanna try?
Barry: Mmm. Well anyway, I know this is last minute, but apparently you gotta have a teacher - write you a college rec-
Dr. Katman: Aw, buddy! I am so honored you asked me. Truly, man!
Barry: Really?
Dr. Katman: Call me a proton! That's how positive I am!
Barry: Dude, I really owe you one!
Dr. Katman: Stop. Just like a neutron, there's no charge. [laughs]
Barry: And also please don't put any of those jokes in my letter.