one thing that concerns me a little is that by doing these partial starts you migth get into a bit of a bad technical habit. if you’re only taking a few steps and then pulling up, does that mean you might develop a high angle of entry, or not pushing out as hard as you should?
sometimes when I want to practice my reactions I crouch down on the ground and jump upwards on the gun. heck, you could do that exercise in a prison cell at guantanamo bay!!