Punch High-Five
Pretending to "bump fists" and then opening your palm up at the last second to high-five eachother.
Person 1: I just won the lottery!
Person 2: Dude! That's awesome, punch high-five!
*High five*
Person 2: You're too slow, you punched my palm!
Person 2: Dude! That's awesome, punch high-five!
*High five*
Person 2: You're too slow, you punched my palm!