I had my student pushed my wife’s wheelchair and he moved to the edge so much that I thought it would fall off.
I said that its not easy to see both sides of the narrow, curving kerb as he was pushing so the risk of the wheelchair falling off is there.
However, with the use of intention he could maintain a mental connection to the kerb. Add in an important principle from Ngok Gar’s Yee Hang Gong No. 17 and he lessened the risk of falling off.
We had a laugh because even in such a mundane task kung fu can be learned.