Abstract: An abdominal exercise device that allows the exerciser to do sit-up type exercises to stress the exerciser's abdominal muscles. The device has a frame assembly made of several members. A deformable seat for the exerciser is connected to frame assembly. The deformable seat is a fillable container. Footholds are positioned on the frame assembly to allow an exerciser to sit on the deformable seat and place the exerciser's feet in the footholds while performing an exercise. Additionally, there are handholds that an exerciser may hold so that an exerciser may stabilize himself while getting on and off the exercise device and during performance of exercise.

Abstract: A method for cutting steel in which an operator uses high pressure propane and oxygen. The operator heats the steel locally until it is molten, positions a cutting torch with a high angle of incidence relative to the molten steel, and then blasts high pressure oxygen at the molten metal. Such blast serves two purposes, heating the molten metal so it is less viscous and then blowing the molten metal away from the steel sheet creating a cutting trench. The cutting torch is positioned relative to the cutting trench to provide even heat. The cutting torch is then moved generally parallel to the cutting trench to lengthen the cut.