BROKEN GLASS
This one takes a bit of a degree of effort to pull off. First, open your partner’s car window all the way down. Then place some broken glass and shovels next to your partner’s car. Now, it looks like a crime scene, doesn’t it? All you need to do now is wait until your partner enters the garage and see the look on his face.
The only downside to this prank is that the partner might actually call the police and report it as a breach of security in the home. The law punishes those that report pranks to 911, and so the wife might get into trouble because of that. It is always better to be prudent when doing pranks like these and to anticipate every possible scenario with a backup plan so that things do not get out of control.