The terrible mistake of applying icy hot to a sore muscle and then forgetting that the left over residue is still on your hands. The victim then uses the same hand to scratch an itch on his testes, which results in the most painful experience imaginable. It’s usually followed by watering at the eyes, which results in wiping the eyes with the same hand causing extreme pain and further watering of the eyes.
Detective: why do you think this guy killed himself?
Witness: I don’t know, just before he did it I saw him running around crying and yelling “my balls, my balls, ouch, my eyes!!!”
Detective: sounds like a classic case of icy hot surprise.