I suppose it’s by far not my most embarising moment, but here’s one that comes first to my mind:
At a metal festival, the less crowded part of the audience far away from the stage, me and my girlfriend of that time were having some “adult private time”. Not exactly aware of what was happening around us and we didn’t really care. I vagely remember “clicks” of photocamera’s (digital camera’s were not that common yet at that time) and laughter from people taking pictures of us. I also remember some smartass lightly “kicking” me in the back but we didn’t react to all this.
The next day my dad asked me how we enjoyed the festival and if we met someone familiar.
“Oh it was fairly good but we didn’t see any familiar faces”.
“Well, it might help if you’d look behind you when I kick you in the back while me, your mother and our neighbours are standing behind you”.