I thought an old man who was painting the outside of his garden fence was giving way to me as I walked past him on the path, because of coronavirus. It seemed like total overkill but this sort of thing does happen and I just go with whatever the other person thinks, especially if it's someone old or vulnerable. So I quicked my step, moved slightly to the other side of the path and said "thanks a lot" as I passed. It's only when I turned my head back that I saw the paintbrush in his hand. He never said a word and had a puzzled look on his face. I laughed when I saw the paintbrush and carried on. I think he thought I was crazy!
I think you had to be there but maybe someone can visualise it.