You and your partner are getting a new stove delivered. You already know your partner isn't the best tipper. Not only that, he gets angry at me when he thinks I over-tip. The last time we got an appliance delivered, I had to quietly slip the guy a twenty to round up the five JB gave him. For crying out loud, it's a refrigerator, not a pizza!
But I digress from my hypothetical scenario. So let's say that after the guy hauls in your new stove and connects the gas line, you prepare yourself with a $20 bill surreptitiously folded in your right hand.
Then, hypothetically, your usually thrifty partner surprises you by handing the guy $30. And the happy Home Depot delivery man shakes his hand. Then reaches out to shake yours.
A: Top off his $30 tip with the $20 bill in your hand?
B: Slip the money in your pocket, hoping nobody notices but knowing everyone will?
C: Offer a hearty fist bump instead?
D: Refuse to shake the poor guy's hand, possibly making yourself appear crazy and/or racist?