He opens up a program on his laptop that causes the laptop to flash a bright, white light for a split second. After the flash, a window of some sort opens up on his laptop. He slides the notebook over some and starts to write whatever was on the screen.
The waiter comes back over and places a steaming cup of coffee in front of him. The waiter them puts his hands together, seeming slightly nervous.
He reaches back into his front, right pocket and pulls out a five dollar and three one dollar bills. He hold them out to the waiter and picks up his cup. He takes a long slow sip from the still steaming cup the places it back on the table. He looks up at the waiter and smiles, "Perfect, like always."