What does a one-handed clap sound like?

Even if it doesn't have a sound, the motion Bart made is something Nate does now....  he waves goodbye!  Yep, seems he was having fun with Aunt Meredith Saturday and decided he'd start waving.

Not as Simpsons quote-worthy, but Nate also decided to mimic Meredith's banging on the table, like ancient drum-messaging.  Too cute.