Well, me too. I was cutting out 2-1/2" strips one day last week, in a hurry of course, and laid my 6x24 ruler with no safety-holding stickers on the back down on my fabric, went to work with the rotary cutter, jumped the track of the ruler and it got my left thumb nail, plumb down into the under-bed. So, now, after wearing a very tight bandaid for a few days, I have a healed up thumb-nail with a blood blister under the nail. I'm still shaking my head at that one, I am always urging my students to be very careful with their rotary cutter. And yesterday, I went to Jo Ann's and bought one of those packages of sticker things that you can put on the back of your ruler to hold it in place. Hope it works--I hate to have to pitch this one and buy a new one--even at half-price at Jo Ann's, they cost a lot anymore.