In reply to deepstar:
When I were a lad (zzz...) Mickey Rooney (no, honestly!) and I found an artillery shell standing at the bottom of a route at Hares Castle, in the Mournes. Naturally we knocked it along the bottom of the crag - like you do. We thought we'd take it up to the top and throw it off but got a bit stuck so lobbed it off the half-way mark instead. Eventually we got bored and may actually have done some climbing.
Next man up, the next day, was one Dave Armstrong, who (unlike us) had been to 'the Eton of Ulster'. Dave took it down from the crag to the local police station. When he put it on the table, the place promptly evacuated. A couple of minutes later, Dave found himself facing some white-knuckled chaps with aforesaid white-knuckles on triggers. Naturally he explained the situation perfectly. After about the third time, they showed signs of actually believing him.
A couple of hours later, the shell was detonated by an army explosives team. When Dave told Mickey, his face went 'a whiter shade of pale'.
All good clean fun, the sort which makes you wonder how, in heaven's name, you survived.
Mick