At the void deck, the old uncle sat with one leg propped on the stone stool. He wasn't playing chess nor checkers, and he wasn't eating winter melon seeds nor sipping kopi out of a plastic bag. He just sat there, almost motionlessly staring into the distance. I then caught a fleeting glint in his eyes- then I knew. This was no mere old uncle that partook in the decadent activities typical of his generation. No, this was a supreme martial arts expert secretly practicing and honing his skills in public.
The question was, whether he knew that I knew. I detected no killing aura on him, but true experts are known to be able to hide their auras. Then again, perhaps he didn't mind being discovered, and that this was some sort of game to him.
As I walked past him, he flashed a toothy grin. "Walk carefully, the ground is slippery." he called out from behind me. Was this a threat? I didn't know. I did the only thing I could- I walked faster. Stride by stride, I distanced myself from the void deck, yet I could still an immense pressure from behind me.
A few seconds later, the old uncle flashed past me on his electric scooter, his few strands of hair flowing majestically against the wind.