Twice that I know of.
One time when it was dark and foggy out, I almost fell into a septic tank. But thankfully my reflexes made me jump at the last second.
Another time, me and my family were swimming on a boat in the middle of a lake when I was very young. I was the last one in the water swimming (I had a noodle since I couldn't swim very well on my own) when dark clouds suddenly began to move over the water. The boat was about 50 feet away from me, and I was floating in the opposite direction when my parents motioned for me to swim towards the boat. When we could start hearing thunder, my parents got even more worried and started up the boat to speed things along. But seconds after it started up, the engine died and lightning strikes could be seen hitting the far end the lake and getting closer. At this point, I was frantically trying to get over and onto the boat, until one of the adults on the boat decided it was time to intervene and jumped into the water and started pulling me over to the boat. By the time we got back on, the engine was humming and we quickly drove it over to shore.
I don't know if this next one would have killed me, but another time when I was about 3, a wasp flew into my open mouth and crawled around for about 30 seconds before flying out.
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Where's the furthest place you've ever traveled, and from where did you start? And what was it like once you got there?