My very first night in a hammock I got to camp later than I expected and was rushing to finish setting up camp in the waning daylight. I noticed too late that my hammock was hung really low, but decided to leave it rather than fiddle in the dark. I was only inches from the ground when I got in, but as long as I'm not scraping anything, I thought, so what?
Sometime in the wee hours I was awoken by a thud/bump straight into my butt, the lowest point. It scared both of us, I think, thumper and thumpee, because whatever it was paused for a moment then took off - stuck underneath for a second. It was hard enough to send me rocking back and forth a few times when it left. After I recovered from the shock I started laughing - what the heck had just run into me? And why didn't it sense my presence at all? Didn't it smell my sweat-stained clothes a few yards away? Does this sort of thing happen a lot? And with bigger creatures?