Gaston The Blunder

In 1957, a strange young man arrived at the offices of Spirou, a popular Belgian comics magazine. When asked what he was doing there, he said he'd been told to come, but didn't remember by whom or why. Puzzled, the editors decided to hire him as a mailroom boy, spelling their own doom.
Over the decades that followed, Gaston LaGaffe, literally Gaston The Blunder, blew up the offices several times with his experiments in chemistry and/or cooking (the two were often hard to tell apart), caused two of his bosses to have a nervous breakdown, shattered all the windows with his self-designed Gaffophone musical instrument, and in countless ways prevented a very important contract from being signed.
The local fire department made it a sport to beat their previous record getting to Spirou. Gaston was an inventor, a hippie, an animal lover (his seagull and his cat became much hated office pets), and a punk. He never meant any harm but he left a trail of destruction in his wake nonetheless, while the unanswered mail piled up.