I took over a gym today and was training for a while. Next thing I know, there was another bugger in there on my team. Pretty cool!
Then that darn red team showed up... epic battles ensued.
Once I ran out of potions from kicking their arse, then them kicking mine, I walked up the embankment to the path and two guys on bikes looked over at me and said "That's where he was!". We had a laugh.
I was sneaky.