They shake hands.
Because they're hill-areas!
Because they Marry Christmas!
Two of my favorites are:
By looking at a bomb
WHOSAGOODGIRRRRLLL Me: *looks around* *slowly raises hand*
A: Trying to hold on to a thought.
A pair of ducks.
HO HO HO, Merry Christmas!
More than you can shake a stick at
They both shake it off.
He just shakes it off.