What in bouncing (*)(*) is going on here? (6 chicks/ONE Video)

All 6 videos came from submits to theChive Instagram…enjoy 2-minutes of fun on a Friday.
Source clip#1 on Instagram: cherokeesavagex
Source clip#2 on Instagram: yael1c
Source clip#3 on Instagram: wilkejen
Source clip#4 on Instagram: golfergirlem
Source clip#5 on Instagram: dawnmarie.xo
Source clip#6 on Instagram: thechive