WOW! That was a huge explosion!!! HAHA glad to see it happen to them though. I take it they were planting a roadside bomb!?! It appears it was in the middle of the road TOO! I wonder if these bloopers happen more often than we think. Thanks for sharing Joe.
It was probably a 155mm soviet shell with an electric detonator with a pressure activated switch in the road. one of the more common large ied setups.