What is this?
it's a ladder/stair.
This is an...
Elevator.
What place is this?
A shopping mall.
What is happening?
The man is pressing the elevator buttons.
What is it?
This is an escalator.
Is it okay to play with the elevator buttons?
No, is not good.
It is safe to jump on an elevator?
No, it is not safe.
You should dance in the elevator?
No, it's not safe!
What is happening?
He is getting out of the elevator.