1- lol yeah even better are holes, walls. Bushes are great for scouting. Place a single rifle in the bus on hold fire and leave him there for a while.
2- Not unstoppable, I never had too much trouble dealing with soviet tanks but I remember a game it had a IS3 with broken tracks and my tram mates were sxhooting at it for a good 5 mn and the beast wouldnt die!
3- i didnt know that, thanks