This one in particular seemed worthy of sharing because of a couple of things. Firstly, if you just saw the artifact and not the reasoning, you would probably see a lot of WTF in having 7 bytes of NOP-type instructions, with five outside and two inside each function; it's a great reveal when you find out what it is for. Then my reaction was "Wow - I don't really design good instrumentation/logging/debugging points in my code, do I? I wonder if there's any part of this idea I can fruitfully rip off for my own code?" It was a nice one-two punch.