That sounds like Pommy talk onetrack. Here in Oz we normally say G'day, but we all have to learn.
I for one do not derive pleasure from taking the pi** out of others misfortune, even if it came about from his misjudgement. Gladly he's ok and lives to tell the story, but wonder what you would have done to prevent an unfortunate tipover?
There's no telling what ruts or stumps there may have been in the ground. I imagine you know no more than the rest of us on here, and his approach looked good to me.
In life it pays to try and be kind if possible, rather than ridicule.
Rant over.