Bah!
The Post Office should pay for his medical care and sanction the negligent driver. Fair, responsible and a near miss on a potential landmine of cost. More, they should have *offered* to do so at the time the incident was reported.
Of course, that assumes the driver filed an incident report. If the responses in this comment section are typical for the rest of the country, it would suggest he probably omitted to do that on the grounds that the only person hurt was injured because he wouldn't mind his own business.
Where do you lot think the bloody money would come from to settle the lawsuits that would arise had the van entered a busy cross street with no-one at the controls?
Azathoth on a bike!