Car Vent Surprise
For this one you will need uninterrupted access to the victim’s car for at least 30 minutes. And a can of tuna, and some sushi. And it is usually best to do this to someone just before the first snow fall of the year.
All you need to do is remove the outside vent covers embedded in the front and rear dashboards. Once removed you will spoon a good amount of fish and sushi into each vent. Then just replace the vent covers.
The first time the victim turns the heat on should be an interesting olfactory experience.