You cut the nerves so it doesn't feel pain????
and how do you think any animal feels pain oh yea, you slice the nerves.
In reality the vast majority of Halal meat is stunned prior to slaughter....there is a big long thread on it where the RSPCA research states as much.
Should legislation be adjusted to account for the 10% that is not (which is actually lower than the amount of commercially slaughtered meat that doesn't meet legislation btw), I would say it is about time.
Kosher butchers however have yet to use the same method of prestunning that Halal advocate, I do not know why.