Why don't Police riders hang off the seat?

[slimwilly]

I first noticed the hanging off style when i was following a sports bike about ten years ago, i was on my 1100 virago , we were in some very nice twisties and he was like a monkey an banana tree, all over the bike :lol , hanging knees out, i just sat planted in the seat and followed him close .Now my mate on his Gixxer thou went on a |Ron Haslam track day last year and now when i go out with him he is doing the same,like a dog with worms :lol .
They found a small roundabout where they actually got there knee down,ha ha ,fools,round and round,i looked on with horror :eek .