That is a true quilting friend, and my first thought would be if I got blood on the quilt. I think sometimes we forget that the rotary cutter is a very sharp razor like tool. I had a friend who forgot to close the blade on her rotary cutter, it fell off the table where she was cutting fabric, landing on her bare foot and had to go to the emergency room for stitches; and had to be off her feet for a short while. We tell our kids not to run with scissors, we need to remind ourselves to close the rotary cutter immediately after use. It pays to be cautious.