i have a pig valve. >> i have other pig parts on me, though. >> actually, i have a cow valve. >> larry: you told me this. i never heard of a cow valve. >> no, they exist. 134 you said pig valve there. >> i made a mistake. it affected my brain. >> larry: letterman and i have the same doctor. >> and you had the same -- >> larry: same surgery. he had quintuple, and i had quintuple. they didn't cut open your chest? >> yes. it sounds so awful. i didn't really have a terrible time. you're supposed to get depressed. i didn't. i wasn't in pain. >> larry: were you a good operator? >> yeah. but, i mean, i guess i was in good shape. and the time that i first came back on the show because i was going it take the summer off was when president obama came on the show in late july.