Being a pyromaniac when he was little, he loved to set things on fire, from curtains to cars to classrooms. He first approached fire the minute he was born, where an accidental fire burned half of the hospital down in which he was born in. He was immune to fire. Although he was sent to hospital for smoke inhalation eight times, he wouldn't complain about minor burns, and would often play with lighters and matches even when his parents and teachers have told him not to every 49 seconds. It wasn't long until his parents discovered that this was a major problem (he was 10) and he was sent for treatment in the best facilities in the world.

 They couldn't do much to stop Peter from contacting fire. He attempted to burn the correctional facility down, and had only succeeded to burn the garden down. People had no choice, they strapped Peter down to a bed, and left him there for 7 days and 7 nights, feeding him (and letting him excrete and urinate, obviously) and hydrating him. He was locked down into the room for a total of 2 years.

Peter quickly grew up as time passed very, very quickly. He was still setting things on fire, but he couldn't be jailed as he was too young. Finally, when he was 16, he received a "fireproof" letter in his mailbox, reading: 

Dear Peter,

We have heard that you really like fires and explosions, so you have been invited to perform in our circus as a pyrotechnician. It will certainly suit you, and I am 100% sure you will enjoy it! (You will be paid well, don't set that on fire as well!)

Best Regards,
The Crazy Circus

Without thinking twice, he agreed, and started working the very next day. With the new performer, the box office received 300% more sales, with more frequent shows and higher ticket prices. Every day, Peter would be blowing mini-explosives in mid-air, or shooting flares towards the crowd, (only 5 injuries were reported so far) or assisting other performers using pyrotechnics.