Stuart Ullman makes a hand gesture he's made before in his speech to Jack in the office.

HALLORAN I thought you did. You folks don't mind if I give Danny some ice cream, while we're waiting for you?
JACK Not at all.
WENDY No, we don't mind.
HALLORAN Good.
WENDY Sound good to you, Danny?
DANNY Yeah.
WENDY Okay. You behave yourself.