You start your campaign by watching the store for hours at different times to get to know the asshat' patterns. His car. You wait till twenty minutes before he gets off work and you set off a tick bomb under his car. The toxic fumes wafts into the cab to curl is thin wisps but the smell is strong when he gets into his car. He gets back out to open the hood but nothing seems wrong. He drives home with the windows rolled down , looking all green of face.