Rolling tape

This just happened minutes ago. My daughter, her older friend and my daughter's younger sister were in her bedroom. Oldest was sitting on bed by her end table, older friend was laying behind her and youngest was on other side of older daughter on the floor. On the end table was a roll of blue paint tape, it was laying flat. Oldest daughter said it stood up so it could roll, rolled off the end table, hit her foot, she said it hurt and then chnaged direction and rolled towards her bedroom door and stopped in the standing position. I would estimate that to about 5 feet of distance the tape rolled, from off end table to bedroom door. The thing that gets me though is daughter saying "tape hit her leg and hurt and then changed direction towards door."