One of the most hilarious moments of my Warhammer 40,000 games was, when in a very small game using 2nd edition rules, the Marines had a Rhino on the table, and the hardest hitting weapon of my Orks (mind, Orks - not Orcs) was a melter. The melter was not able to penetrate the Rhino's armour. Except the turret armour. Bravely, my Ork Boss moved in front of the Rhino, fired the melter, hit the turret and penetrated the armour. The roll on the armour chart caused an explosion which triggered another roll on the body damage chart, triggering an explosion in the body as well which resulted in the crew getting killed and sending the Rhino out of control. The brave Ork boss was rewarded with the out of control Rhino careening around him, rolling randomly across the board for two turns, before crashing into some trees.
I can't remember who won the small skirmish, but I will never forget this highly improbable chain of events
