I work in what is said to be the worst hub in the U.S. concerning safety and injuries and it's not good. There are many times I see people on sort aisles trapped in feet in boxes and unable to move freely. There is also the possibility of falling packages that can strike you. I walk away and refuse to work unsafely, if there is no egress and escape path, since it's dangerous and unnecessary as well as illegal. A 60 pound package is falling from above and you cannot move to avoid it, is not a good position to be in.