Scooter in the river

We often walk over the bridge that crosses this river, and usually stop to look at the fat salmon that seem to like to lie below the bridge, safe from the fishermen who are not allowed to fish there. Recently we saw they were joined by a small scooter. The question is- how did it land there, did a bully grab it and threw it over the bridge's railings, or did the juvenile owner decide to ride into the river and grab a salmon for lunch? We will never know, but in the meantime I wish someone would remove the thing, I am sure the salmon would also appreciate it