Can you find the missing piece of the Porsche?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

What do you call a fish without an eye?

You visit a home for specially-abled children on the occasion of Christmas where you meet with 50 children. You have a box of chocolates containing 50 chocolates exactly.

What if you were asked to one chocolate to each child in a manner that one chocolate still remains in the box? Is it possible?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

Why did the Girl throw the butter out of the window?

I’m tall when I’m young, and I’m short when I’m old. What am I?