A funny video has emerged of a famous 'mad scientist' YouTuber causing a minor explosion and scaring his six-year-old son. br br Jacob The Mad Scientist from Australia was filming an episode of Make Science Fun for his YouTube channel when something went wrong. br br Jacob accidentally set off a explosion of Touch Powder, otherwise known as pixie dust, which is made from ammonia and iodine and is an extremely unstable material which explodes into a big puff of purple gas when lightly touched.br br Fortunately, neither Jacob or his son Samuel were injured, but Samuel was a little upset.