Born on the desolate planet of Adelaidium, Thunderpants earnt a life as a tester of the latest contraptions to take a shit in. Thunderpants' father, Lunch-trnucheon Longdrop, had been camping in the woods when he had the urge to take a shit. With ne'er a toilet in sprinting distance, Lunch found a rabbit burrow, and proceeded to fill it with his bowel matter.
'I've got it', cried Lunch as he wiped his arse with a squirrel. 'I'll build toilets in the outdoors with big, fuck-off holes to take the chocolate thunder'. With that he set to work, building no more than 30,000 toilets around the world in the remotest regions.
5 years late Lunch found a wife, and had finished the last of his thunder boxes which he called 'Longdrops', after his family name. He then had a son who did some stuff and shit.