I don’t know how you know you’re alive but I derive certainty about the fact of my own existence from my observation of big, noisy storms, which might explain why thunderbolt-hurling gods have had such a good run over the centuries.
thunderclap
I undo
my last action
Red Dragonfly 
Happened to read this while a serious thunder storm was raging in New York. Quite timely, I’m still smiling.