He knock 9 times at the door.
The first occurrence of the multiple repeated knocks appears in Series 1 Episode 10 - The Loobenfeld Decay:Sheldon: (Knock, knock, knock, knock) Leonard, (Knock, knock, knock, knock) Leonard, (Knock, knock, knock, knock) Leonard...Sheldon: (Knock, knock, knock, knock) Penny, (Knock, knock, knock, knock) Penny, (Knock, knock, knock, knock)Penny, (door opens) Good morning.
it depends what knock on the door?
4242564 whenever you wanna knock on Death's door~
the man in the yellow suit knock the door"
Do you mean a doorbell? No he does not have a doorbell. Guests usualy knock on his door or they may just barge in.
The Big Bang Theory. It is Sheldon's method of knocking on Penny's door, he knocks three times, shouts PENNY, then repeats twice.
The first occurrence of the multiple repeated knocks appears in Series 1 Episode 10 - The Loobenfeld Decay:Sheldon: (Knock, knock, knock, knock) Leonard, (Knock, knock, knock, knock) Leonard, (Knock, knock, knock, knock) Leonard...Sheldon: (Knock, knock, knock, knock) Penny, (Knock, knock, knock, knock) Penny, (Knock, knock, knock, knock)Penny, (door opens) Good morning.
Click on the door 3 times (knock knock knock).
Click on the door 3 times (knock knock knock).
Click on the door 3 times (knock knock knock).
Click on the door 3 times (knock knock knock).
Click on the door 3 times (knock knock knock).
Click on the door 3 times (knock knock knock).
Click on the door 3 times (knock knock knock).
Knock 4 times on the door, starting low and each knock higher on the door.
Knock 4 times on the door, starting low and each knock higher on the door.
Knock 4 times on the door, starting low and each knock higher on the door.