That cardboard hurts when it cuts you . I found that out last night while I was trying to keep a box line moving. The line jammed up and when I went to unjam it I sliced my arm on one of the edges of a box that was next to the one causing the jam, and it was one of the bigger boxes too. Luckily it was not a deep cut as it got me right across a vein.
And here I just thought I only had to worry about regular paper cuts.