Penny: [sitting on Sheldon's spot, starts to move when she sees him] Hey, sorry Sheldon, I'll move.
Sheldon: [does not seem bothered by Penny] Why? My spot, your spot, what difference does it make?
[Penny and Leonard frown at him]
Penny: Okay, what just happened?
Leonard: I don't know... Between you playing chess like Bobby Fischer, and Sheldon being okay with you sitting in his spot... I'm guessing someone went back in time, stepped on a bug and changed the course of human events.
Sheldon: [does not seem bothered by Penny] Why? My spot, your spot, what difference does it make?
[Penny and Leonard frown at him]
Penny: Okay, what just happened?
Leonard: I don't know... Between you playing chess like Bobby Fischer, and Sheldon being okay with you sitting in his spot... I'm guessing someone went back in time, stepped on a bug and changed the course of human events.
Penny : [sitting on Sheldon's spot, starts to move when she sees him] Hey, sorry Sheldon, I'll move.
Sheldon : [does not seem bothered by Penny] Why? My spot, your spot, what difference does it make?
[Penny and Leonard frown at him]
Penny : Okay, what just happened?
Leonard : I don't know... Between you playing chess like Bobby Fischer, and Sheldon being okay with you sitting in his spot... I'm guessing someone went back in time, stepped on a bug and changed the course of human events.
http://www.tv-quotes.com/shows/the-big-bang-theory/quote_21029.html
