Servitob: Can my Razorback ram your Razorwing fighter?
ZombiePirate: It’s an aeroplane, but it’s got a base so technically the rules say it can be rammed.
Servitob: OK, my ground based tank is going to ram your flying aeroplane.
-CRUMP-
Servitob: Wait, I think that was my damaged razorback. I just tried to ram your flying aeroplane with my immobilised ground based tank…
6 Inch Move 
You also forgot that with the whole 4″ you moved the strength of the ram would be 3 and therefore unable to dent my amazing AV10! But yeah, being immobilised and moving really was good, those stealth Techmarines are doing their job!
LOL.
Ahhh the fun of gameing.