I had to laugh at the "don't tell my mum" bit XD It reminded me of a story I was told my someone (can't remember quite who now) who was doing one of the long overland drives to a country town when all of a sudden a kid on a bike came out of nowhere. The storyteller was doing 110kmh on this country road so after clipping this kid on the bike and managing to stop in a hurry they of course assumed the worst as they rushed back.
The kid had somehow managed to bounce and escape relatively unscathed (aside from some abrasions from coming off the bike) and the first words out of their mouth was apparently also "Don't tell my mum." Priorities XD
Glad you lived to tell the tale!
With the amount of close calls so many kids have, it really is a wonder how many of us survive to adulthood.
When I was about 20 or so, I told her about this story and she was shocked I was able to keep it a secret at all, let alone have some others keep it also. :)