As far as party tricks go, this one would bring any room to a standstill. Not sure how or when this girl realised she could do this but you can’t deny it’s an impressive feat:
That has to be awkward for any couples in attendance. No way you can stand next to your girlfriend watching this girl deep throat a balloon without the vibe getting just a little uncomfortable. Do you clap afterwards? Do you tell her how impressive her party trick was? Probably best to keep your mouth shut and pretend it never even happened.
P.S. Something tells us that this girl and Auntie Angel (of world class grapefruit blow job technique fame) could teach each other a thing or two.