Our son was up today and we went out in the garage to work on the 511B When we looked at it, there was a mouse setting on the front axle. With closer inspection we discovered that it was alive, but it's hind quarters were wedged in the 5/8" hole in the axle tube, and could't get traction enough with it's front feet to pull it'self out. Scott reached down and eased him/her out and it didn't even try to bite. Felt so sorry for it so we carried it out to ehe edge of the lawn and set it down. Went back a bit later and it was gone.