Mr Bayliss' hair caught fire but he managed to retrieve a fire extinguisher from his store.
"But because of the burns on my neck I did not have the strength to start it," he said.
He then reversed the vehicle away from the building and urged the owner of a neighbouring car to move it and tried to use a hose to put the fire out, but it was too fierce. A group of about 60 people soon formed. Some went to his aid and "lots of people ran away", fearing further blasts.
Mr Bayliss had been inundated with cards, flowers, and texts from well-wishers. His wife, Cushla, said Tauranga Hospital nurses and doctors had been "absolutely amazing".
The cause of the fire is still being investigated.