Gaeboo didn't show much emotion at all, except one: refined anger as he fell back onto his side again when he was bumped by the same guy. His face was not happy whatsoever, but what was new? He looked up at Maker and shook his head in pure disappointment.
"I hate you, I hate this costume, I hate this lake, I hate this party, I hate all of your ideas, I hate my glasses, I hate that guy who bumped into me, and I hate today."
He wriggled around on the ground in an attempt to get off the ground. As you'd expect, hard to do it without arms, so he completely failed. Instead, he fell onto his side. He groaned even more, his costume bending slightly as he curved his body to extenuate how pissed he was as he groaned louder.