i don't know if i would burn a bridge or not. they do REALLY like me but i wouldn't just up and leave i would explain it first and then start the transfer. honestly i would "burn a bridge" either way, with my new manager if i didn't take it or my current manager if i did. problem is that in my current position, i'm also friendly with my manager's manager and my manager's manager's manager. i'd also lose that as well