Oh my god, confined spaces
I could never go caving - the thought of thousands of tonnes of rock above and around me makes me feel a bit ill. *shudders*
I tried to explain this to a friend, and they just looked at me and went '...but you jump out of planes!'
Yeah, I know, I know
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"I have done that," says my memory. "I cannot have done that," says my pride, and remains adamant. At last, memory yields. - Nietzsche