Raj: Go for Dr. K.
Dr. Neil deGrasse Tyson: Is this Rajesh Koothrappali?
Raj: Yes. Who is this?
Dr. Neil deGrasse Tyson: Neil deGrasse Tyson.
Raj: (stammers) Uh, wow. (chuckles) How fun is this Twitter thing, huh?
Dr. Neil deGrasse Tyson: You think you're funny?
Raj: I'm not Seinfeld funny, but I did an open mic night once.
Dr. Neil deGrasse Tyson: You're not funny.
Raj: Yeah, that's what they said at the Chuckle Hut.
Dr. Neil deGrasse Tyson: How about this, I've got a book signing at Vroman's in Pasadena next week. Why don't you come by and say some of those things to my face?
Raj: (chuckles) Oh, no, but thanks for the invite.
Dr. Neil deGrasse Tyson: Smart move, and the next time you pick up your phone, remember, I'm the guy who kicked Pluto out of the solar system.
Raj: And it deserved it, sir. Thank you. Bye-bye.