Rider's noise has indeed woken the house, though most resolve to go back to sleep. Most, but not all. He could be faulted for being too curious, and if his mother caught him she'd give him an awful scolding. Regardless, Satoshi Tohsaka used all the stealth his 11 year old body could muster to sneak down the hall, past his mother's room, and down the stairs to find the mysterious man she'd been associating with the past two weeks.