A Wild Young Under-Whimsy

Just a hypothetical. Just say someone was up quite early watching Video Hits and having a cup of tea and some vegemite and peanut butter toast while their party animal housemates slept in. And as they took a bite out of their toast some movement caught their eye and they noticed a small mouse creeping across the carpet behind the television. And then when they went to get a mousecatching apparatus (just for the sake of argument, let's say it was a plastic champagne flute that this person found on the mantelpiece), the mouse had vanished somewhere, even though this person had closed the living room doors to trap it in there.

My hypothetical question is: Should this person tell their housemates about this incident?