The clapping pull up is a fun variation of a regular pullup. Perform the same form done in a regular pull up, however on the way up to the bar explode up and let go of the bar. When you let go clap your hands together and then grab the bar again.

Do not try this until you can do at least 10-15 pullups. The last thing you want to do is let go and try to clap but do not get high enough and fall.