Usually, Patrick "Dr. McDreamy" Dempsey stays away from all real-life medical practice, he said on 'The Tonight Show' (weeknights, 11:35PM ET on NBC). On planes, when a request is made for a doc, other passengers look at him with expressions of 'Is he gonna get up?' and "you pray to God someone else is there, and usually it's the [real] doctor next to you."

But there have been occasions when he's used medical knowledge learned on the show in his daily life. For example, his daughter cut her chin open while the family was in a small Texas town. At the hospital, Dempsey noticed that the doctor about to stitch her up had slightly shaky hands.

The 'Grey's Anatomy' actor said to him, "Why don't you just put the [medical] glue in there instead of the stitching? 'That's a good idea, young man,'" was the doctor's response. "No stitching, no crying ... It was perfect," Dempsey said.