hi! i found a possible cultural reference!
in the episode "the man" (season 3 episode 24) richard and louie have a "man-off" and at one point gumball tells them to man-dance. the dance that richard does is very similar to the dance that john jacobson made in 2011 called "double dream hands".
heres the links for both richard dancing and john jacobson dancing for comparison!
richard dancing (timestamp for dance is 2:24)
https://youtu.be/sn_vRp9wR7g?feature=shared
john jacobson dance (timestamp for dance is 0:45 and multiple other times in the video)
https://youtu.be/1qTY73Ruq_E?si=vy_R5iFMTonU4Cdb