Yea. I was running through to the archon priest i believe and they put a barrier to keep out my pike because they didnt want people coming up the wall. After the two hydra fight. If they didnt want you bringing them then just freaking test every little rock and slope people could use with a vehicle to get up. Dont throw up a barrier :\ If i find any exploit it's vehicle exploits. Nothing more fun than destroying enemies with a tank where a tank isnt suppose to be.