Why was the computer cold?

Because it left its Windows open.

What do you call a sleeping bull?

A bulldozer.

My ghost photography business failed because I could never get a clear spirit.

I took my car into the shop the other day because it was making a weird knocking sound under the hood. The mechanic spent a long time listening carefully and checking all the hoses and belts.

He said he needed to do some intensive car-diology.