Get on, Get off
Incorrect : He climbed the bus.
Correct : He got on the bus.
Incorrect : She came down from the bus.
Correct : She got off the bus.
Note: "To climb' means "to go up towards the top of”. Therefore, we can climb a hill, a tree etc but not a vehicle. On the other hand, we can “alight from', "get out of', 'get down from' or 'get off’ a vehicle.