For a day-trip, I tried to make a quick and easy lunch by using canned tuna (with lemon sauce) and canned mushrooms (with butter sauce).
The two foodstuffs combined into something uniquely unholy. I was nauseous for several hours, and at the end of the day I could still taste the savage flavour whenever I burped.
Mushrooms are good. Canned tuna is good. But when the mushrooms are from a can, and the two foods are brought together, the result is something that one should never try at home.