[grey_whiskers]

Anyone ever associated with Boston college life would know the "tie-on-the-door knob" signal

When the dorm room's a-rockin, don't come a-knockin?

or

When the temporarily-assigned college-affiliated student housing sleeping quarters are presenting quasi-harmonic(*) motion, please refrain from striking the usually wooden, but sometimes likely to be metal or metal-and-wood, hinged entryway in a rhythmic, but such rhythm not necessarily in resonance with the harmonic motion of the room, fashion, in order to gain the attention of the occupants? /Harvard>

Cheers!

(*) or hormonic, actually.

[Daffynition]

"hormonic"

HAHAHAHA!