I will NEVER, NEVER use screw in steps again. My oldman had one he was stepping on break, he swung into the another step that was in the tree and it stabbed him under the armpit. Doctors said it missed his lung by about 1/4 inch.
I know that climbing sticks fail too, but those screw in steps can be dangerous. Everyone be careful! especially those who use those screw in steps.
He was lucky, my mom & I were in the woods w/ him when it happened so he had help right away and got to the hospital quickly, well if an hour is considered quickly..