Mine was in Canada on one of the machine gun battle runs you do at the start of the exercise. Bombed-up with 7.62 and motoring down to the start line we were going down this hill towards the start line and all of a sudden everything died. Everything even the IC in the tank couldnt talk to anyone main engine dead just the genny tootling away. We ground to a halt on the prairie and when the REME arrived they made a lot of sucking tutt-tutt noises. It turned out that there was a spent round from the previous battle group which had stuck iin the RBJ. For those who don't know the RBJ is the Rotary Base Junction-box and passes power from the hull to the turret. The case had been flattened and passed between the contacts so it couldn't go round anymore. It ripped itself to pieces and tore the thing to bits. We thought we were in for at least a day in Camp Crowfoot but the LAD changed it in a few hours (b@stards) and we were back on the road by the next day. What was yours?