A quick sketch. Any good?
INT. BEDROOM β NIGHT
VERY DRUNK, BRIAN CREEPS INTO BED WITH A FULL PINT GLASS OF WATER, TRYING NOT TO WAKE HIS SLEEPING GIRLFRIEND.
HE SLEEPILY RAISES THE GLASS TO HIS LIPS.
INT. BEDROOM β LATER
BRIAN SLEEPS UNEASILY. HE WAKES UP. AT FIRST HEβS FAIRLY CONTENT β UNTIL HE STARTS TO FEEL THE DAMP BED AROUND HIM.
BRIAN
(Quietly; to himself)
Oh no... I pissed myself!
HE LOOKS NERVOUSLY OVER TO THE SLEEPING GIRLFRIEND. AND THEN STARTS TO FEEL UNDER HIS BACK/ARSE. SUDDEN RELIEF.
BRIAN
Oh, wait a minute...
HE PULLS OUT THE BLOODY SHATTERED REMAINS OF THE PINT GLASS FROM UNDER HIM.
BRIAN
Phew!