They knock on the door.

Sheldon, are you in there, Howard asks.

Go away, you can't come in here, I've barricaded the door. There are lots of heavy objects blocking you from opening the door. The objects reach the wall on the other side of the door, so by applying simple physics to this problem I've created as impenetrable barricade as I possibly can for the door.

Sheldon, do you have a bathroom in there, Leonard asks.

No, but I'm one step ahead of you, I have a Mr. Bucket, a portable toilet here with me, Sheldon says and holds a big bucket in one of his hands and a foldable chair with a hole in the middle in the other hand along with two toilet paper rolls.

I have everything I need to survive right here and tell Kripke he can't have his 20 percent cut of it. It's all mine, I'm planning to survive this.

Hi guys, Kripke says walking past the guys. What is Sheldon up to, he asks and takes a sip from the steaming coffee mug.

He has barricaded himself in there, thanks to you. He thinks you are here to take a part of his food.

No, I would never do that, Kripke says. I have lots of food he says and shows a plastic bag with food in it. I just wanted to mess with him, you know how it goes. He is always so nice to me. You know what I'm talking about, right guys? He is always so nice and polite. Why do you want to hang with him. I've got some sandwiches in my lab along with some Bunsen burners. And a couple of nice ladies studying for PhDs said they will be stopping by soon. You know, because I got the heat on in my lab. What do you say guys, wanna come with me or stay here with Sheldon?

Cold air hits the hallway and everyone shivers.

We're coming with you, the guys say and walk away.

Sheldon is laying on top of his desk, with a glass pressed against the door.

Traitors, going with Kripke, he whispers and looks at the corner where Mr Bucket is placed below the folding chair with a hole in it.

I can make it without them. Now I have time to finish the equation, he says to himself and looks the the board.