If you're a bus driver you can play the following trick on your passengers on April-fool-day.

At some bus stop you leave your seat and enter the salon as a usual passenger. Thus after some time has passed the people in the bus start to show their indignation. And you join them wondering where that damn driver has vanished.

After a while you say loudly: "The hell with that driver! We'll do without!" And you go to the driver's seat and start driving.