Yoo-hoooo! Be a doll and add a funny thing to do.
"I'm contemplative, yet sincere--intellectual, yet spontaneous. And I have no idea what to do with this hand."
This is a classic Dad Joke, where one pretends to be astonished at the $7.13 one is paying for coffee and a sandwich (best used if there is another person at the table to appreciate the humor). See also Parents.