This is also possible in a Spike Milligan kind of way but not especially helpful as having boots on your hands while firing a rifle is, at the very least, a bit clumsy. If you had particular skills in this area you might be able to fire the weapon with your toes while doing a handstand into your army boots. This presents its own difficulties with toe size, dexterity, trigger access and loss of balance due to report after firing. But given that problem-solving by killing people is already pretty stupid then this can only improve matters or at least improvise them.
Jet McDonald 