For the past two months inventor Yezin Al-Qaysi has been riding the Toronto subway in Canada wearing a huge black "mad helmet".
The hazmat (hazardous materials) helmet completely encloses his head and upper torso, and has a visor that extends all the way down to his chest.
On the back is a battery-powered fan and filter respirator system that purifies air that is sucked in, and pushes "stale" air out.
Looking like a dystopian figure straight out of an apocalyptic movie, the 32-year-old unsurprisingly gets some strong reactions.
"Somebody screamed: 'Where did you get that!' and many people approach me out of curiosity," he says.
"Others are amazed.. They certainly don't laugh, but even if they do, I cannot see their mouths because everyone is wearing masks."
