Americanisms annoy me :)
I'm still trying to figure out why Americans call petrol gas when it's obviously a liquid
(yes, I know gases can exist in other states, no need for pedants to point this out, this is a fun thread)
I feel the same about why we call the boot of a car the boot, there is seldom boots in there or shoes, there is 45,673 empty shopping bags though. The US trunk is probably more accurate as cars of old had large boxes or trunks on the back to carry lunch, goods, bodies, dogs etc etc .