Maybe you inhaled the spirit of a lazy ghost that doesn't haunt its victim so much as sap them of their desire to do anything productive. Maybe it was a communist ghost. In all seriousness, and please don't take my joking as anything more than a need to incorporate my mocking of ghosts in bizarre contexts. I've had bad nights sparring too, and sometimes there are things that aren't as immediate that are affecting your game on that particular night. Sometimes something as simple as a bad day at work, or skipping a meal can do it. Sometimes being near something negative and then having that in my head was enough. The mind is an iceberg and we are aware of the 10% floating above the surface - everything else is conjecture.