1.10. He was killed by breakfast. (JM original)

1.10 answer: A man is camping in the mountains. He makes breakfast,
then puts pepper on his food (eggs, perhaps). The pepper makes him sneeze
loudly, which starts an avalanche, which kills him.

1.10a. A man lay dead in a field. Next to him was a gun. One shot had
been fired and because of that shot the man had died. Yet the man was not
shot; in fact, there was no wound or mark on the body. (BGT)

1.10a answer: He fired the gun and caused an avalanche.