Fari from Norway had a full weekend of private lessons with Master Wong back in July 2014. He took the opportunity to ask as much questions as he can to get a more clearer understanding of techniques used to defend your self while sitting down or best ways to respond.
You can ask Master Wong questions directly too at classes in Ipswich. For more info on this visit: http://wingchunmaster.tv/
or http://masterwongacademy.com/