Use several bags or a stronger bag. Tape yourself to a chair...

Use several bags or a stronger bag. Tape yourself to a chair with one arm free to apply bag, chair has to be stable. Have a loop with a slip knot on the arm of chair on the side of the free hand. Apply bags and tape, while concious slip hand into loop and tighten. There is more preparation but if you cant think of it yourself I suggest you dont worry about the whole process.