Laughing time

Laugh wan kill me...
A psychiatrist wanted to know how many of his
patients have been cured of madness, so he
assembled them in a classroom and drew a big car
on the board.
He then told the class that if anyone could push the car on the board, that person would
receive a gift of N20,000 and would be free to go
home.
On hearing this, they all rushed to the board to
push the car except one young lady who remained
in her seat at the back smiling. The psychiatrist with joy and excitement on his face
seeing that somebody has been cured of madness
went to her and asked,
"You, why
didn’t you join your mates to push the car"?
She replied "don't mind those mad people, they are
just fooling themselves . . . Hahaha, they don't know that the car key is in my pocket.