On Saturday, Smith spoke to the ODT after he had successfully demonstrated a backflip-type manoeuvre to other riders on a motocross track outside Alexandra.
"That's my first backflip since I was injured, but you can't be the tutor at something like this and tell others how to do it, if you don't step up yourself.
"Landing these things is probably 50:50 whether you make it or whether you have a trip to hospital, but I'm used to hospital - it's my home away from home."
A group of spectators and riders at yesterday's boot camp watched in awe as Smith successfully completed another backflip and then in horror as he misjudged the manoeuvre and crashed during his next attempt, landing on his shoulder.
The South Island manager of Smith's Moto Mayhem company, Regan Healey, said the rider's new helmet "probably saved his life".
"He'd nailed the backflip the day before and again the first time [on Sunday] and then had another go, doing it for the boys who were there, to give them a buzz, but he under-rotated, and crashed."
He was taken to Dunstan Hospital first and then to Dunedin Hospital.
"He wasn't looking too flash," Healey said, "but he's a real fighter. He proved that last time around."