I was trying to get the last ml of juice out of a bottle one time, and instead of popping the top off I had the tip of the needle just barely pushed in. Well as I was holding the bottle with one hand, and trying to hold the needle and pull back the plundger with the other, the needle slipped out. When it slipped out the needle whent right in one side of my thumb and out of the other. Scared the hell out of me it happened so fast.