how to give an impressive answer in an interview when asked-"introduce urselves?"...?

Answer 1

People are most impressed in those situations by sincerity, letting yourself come through, if it is natural to you to use some humor then do so. Don't try to be too clever, or too impressive, that usually comes across as false. Be yourself, and emphasize what makes you unique, special, and interesting, your strengths.

Answer 2

"If things go well, I'm your newest employee." I know its kind of a suckup but it breaks the ice.