Yes well, fortunately shells are not readily available here. Come to think of it though, digging round here often leads to discoveries of WWII bombs which didn't detonate some 50 years back. Every once in a while they find a really large one and have to clear out large areas; this mainly occurs in the Ruhrgebiet though.

I'd never heard of the name 'back-hoe' that RCommando + Sparteye mentioned. It seems terms are used quite loosely for all these machines.