How would you defend yourself from a tiger?

Imagine this: you're alone with a tiger in a wide open field and you've got no weapons. What do you do to slay your enemy?
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I once read that a man killed a grizzly bear by shoving his arm down its throat and punching it in the head till it died. The bear couldn't breathe and was trying to vomit. Sounds mean but Its better than doing nothing lol.
How would you defend yourself from a tiger?
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