I was trying out a new hammock with integrated bug screen once and I climbed in, zipped up the bug screen, laid back and immediately flipped upside down. The pressure on the bugnet would not allow the zippers to work. Once I stopped panicking, I realized I could get my feet under me and on the ground enough to relieve the pressure and get it unzipped and free. I should have had a knife with me to cut my way out of that one. I still have that hammock, but won't ever use it again.