When I used it first in my driveway (which is more like a green lane than a driveway in places, to be honest) it rolled forward fine then started to lean to the right because it hit a slight slope going that way. I lost control completely because the handle pulled out of its socket (as has to do to go from "out" to "folded" if you see what I mean) and the bike went down on the right hand side.
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