My in-laws lived nearby, and also would frequently call in unannounced.
One sunny morning while I was working naked in the backyard my father-in-law walked round the corner of the house, and was right near me before either of us had the chance to prevent the position.
I stopped shovelling and attempted to stand “strategically” whilst carrying on http://x-nudism.net for several minutes.
Then he went inside to see my wife (his daughter). We (wife and I) laughed about it afterwards, but it was never spoken of between me and FiL!
Oddest and most liberating was being in a peak of 4,300 naked people posing http://macgallery.net in central Melbourne for Spencer Tunick in October 2001 – at some point of the morning it happened to me that whatever our race, we are much more alike than we’re different – a fairly serious and reassuring thought coming so recently after the horror of September 11!