Taxiing

Our son getting in position for a downhill, crosswind take off from a grass airstrip. All successfully achieved.
In the last 17 months he has learned to fly, has gone solo many times and achieved his night rating by flying around London over (roughly) the M25. 
None of this is anything we would be interested in trying. It is also eye-wateringly expensive but he is self employed and charges a lot of money for what he does.