doesn't turn around. the same can't be said for its crew who fled. the ukrainians here a little gleeful this keeps happening. they left the tank? >> they needed to do that. >> reporter: they didn't have much of a choice? >> they didn't have a choice. >> reporter: i see. then a warning. >> there's a helicopter coming. >> reporter: there is a helicopter spotted and we have to leave. rushing in the weapons, this david has hit the russian goliath with again and again. the kremlin is sure to impose a cost on anyone it can.