A few hours later and he would have felt normal enough to drive a car or ride a motor bike,
People I have spoken to say the effect lasts no more than an hour so I don't think he was directly under the influence.
Whilst someone may
feel normal enough to drive a car, it does not mean that he
was normal enough to do so - I would like to see proper research rather than go on someones perception which can be very different from what is actually the case.
As it is
anything that reduced the performance in any way of what would seem to be a fairly incompetent and irresponsible pilot cannot have helped.