talking clock

[retired]

A drunk walks out of a bar after closing time and invites two friends up to see his new apartment.
The friends see there is a gong with a rubber mallet against the bedroom wall and ask why it's there.
The drunk replies,
"It's not a gong, it's a talking clock, watch."
He picks up the mallet and smashes the gong.
From the other side of the wall a voice yells

"It's 4AM you idiot!"