We were lucky enough to have my son chosen as the 'sword puller-outer' this past April. We were standing around by the carousel when Merlin came out to sign autographs, etc, right after they announced the show would be starting soon. Instead of crowding around him, we stood RIGHT in front of the stone/sword area and when he moved to start the show, we were front and center. It was starting to rain, so he only chose 1 person to try pulling out the sword - and my son was it!
He went up and tried to pull it out before Merlin wanted him to, and stopped. Oops.
Anyways, he did pull it out and got a 'temporary ruler of the realm gold medal' to hang around his neck for the day (he cherises that) and a certificate.
It was great!