It was me who slipped a home-grown scotch bonnet chilli (just a small one, mind), into the sandwich of a co-worker to whom I had taken a particular dislike and who had a very low tolerance for spicy food.
Before she actually bit down on the aforementioned small chilli, I had never seen anyone simultaenously cough, belch, fart, sneeze and have an asthma attack while red in the face and making a noise like, "Oooooarghguhurrrr!" while drooling profusely.