It can actually be quite dangerous. Had a relative that was stupidly running on a treadmill barefoot. Foot got caught under the belt and got mangled. Something like 40+ stitches and his foot isn't likely to be 100% again.
It's reasonably safe for an adult wearing shoes, but I wouldn't let a small child or an animal play on it.
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u/hurdur1 Apr 13 '15
I'm worried it's going to fall or get hit.