“Last week, he ‘accidentally’ crushed a steel pipe because he was mad about losing in Mario Kart.”
The comedy comes from the :
Example (normal, non-taboo):
When I say my little brother Haru is “huge,” people usually laugh. “He’s only twelve,” they say, glancing at his slight frame, his shy smile, his hand-me-down hoodie two sizes too small. But they don’t understand. uchi no otouto maji de dekain dakedo mi ni konai