It sounds like it's background noise on a kid's mic, and he stops keying his mic. The demo is on the short side to determine if it's on purpose or if it continues.
 
It sounds like it's background noise on a kid's mic, and he stops keying his mic. The demo is on the short side to determine if it's on purpose or if it continues.

Ah, that makes sense. There are moments you can hear the "beep boop" from 'Boyfriend' but it's hard to tell.