A similar thing happened to a guy I know. He just got into his brand new X5 and a bloke pulled him out and two others started hitting him with baseball bats screaming at him to hand over the keys.
What they obviously didn't know is that my mate ran the doors to all the local pubs and clubs, and inside the house were his brother and two colleagues.
The three car jackers, were soon, shall we say, rendered immobile, the plod were called and carted the three off to the nick.
However, the all got suspended sentences, and my mate and his pals were cautioned as the police said they used excessive force! Ffs!
Can't even protect your own property these days either!