after watching nip/tuck it made me think why do you have to count backwards from 10 when the anaesthesia is kicking in, why not forwards from 1, or why do you have to count anyway?
Reminds me of when I had to go for a D&C following a miscarriage. The orderly was wheeling me down to theatre singing 'Like A Virgin'..it totally relaxed me!
And yes..it is the 'lift off' theory..and you usually fall asleep before you get to 6 ;o)
I think they do it to give you something else to focus on as they are giving you the injection. My Doctor or nurse always says "So what job do you do?" as they are injecting me, to detract my brain from the pain! They never bother to listen to my reply!