Best to knock first
This may not be 'awesome' but it was certainly a memorable encounter. My non-nudist wife had gone out for the day so I was enjoying some rare naked time at home.
A female friend of ours dropped by for a surprise visit, and for some completely unexplained reason, she chose to open the front door and just walk into the house without knocking first.
Obviously this led to an even bigger surprise than she had expected as I was completely starkers and had no clothes close at hand to cover myself up with. A brief moment of near panic passed and I then just stood there more than a little surprised.
Anyway, after a few initial giggles, she was completely okay with the situation and we just chatted normally thereafter. It turns out that her parents had been nudists during her upbringing so it was not really a new experience for her.
It felt quite strange to be chatting to our friend while I was naked but I was glad she didn't get annoyed or offended. I wonder if she always makes sure to knock at the door first now when visiting...!