The victim escaped from the fireball and, despite being airlifted to hospital, is expected to survive.
Ex-Aston Villa striker Dalian Atkinson died in August 2016 after being Tasered by police.
Filippo Lombardi was cleared of attacking Sean Cox but jailed for three years for violent disorder.
Hospital users are encouraged to activate the announcements when they see someone smoking on site.
The RSPCA says the dogs found in Leicestershire and Norfolk are thought to have been used for breeding.