You bump your fists together, and then spread your fingers apart as you pull your hand back, as if your fist is "exploding" outward. A few gif examples: https:

You bump your fists together, and then spread your fingers apart as you pull your hand back, as if your fist is "exploding" outward. A few gif examples: https://gph.is/g/aK8Yww6 https://gph.is/g/aK8Yww6 https://gph.is/2q6aAIV https://gph.is/2q6aAIV https://www.pri.org/stories/2013-02-13/gif-day-obamas-exploding-fist-bump-state-union https://www.pri.org/stories/2013-02-13/gif-day-obamas-explod...