That is truly amazing! Interesting about the very short grip. Early Scottish Highland dirks also had very short handles, and if I understand your description correctly, were held in a similar manner. Thank you for sharing. What an inspiration.
Considering how many of us have our shops piled high with stuff, err... arranged, I think the old boat rule of always having your extinguisher between you and your best exit is a good rule. Most boats keep their extinguishers near the hatch you would naturally use to escape from that space. Fires can get surprising big surprising fast. You do not want the fire between you and an exit if things get a little too sporty.