Here is an example of what I refer to as the fast kill glitch. Sporadically, when killing monsters, the game will immediately return to the map screen, skipping the usual five second death animation. This most commonly happens when you kill a monster just as the battle timer runs out, but can also happen, rarely, at other times, as seen here. I have not determined what causes this. Were I able to reliably trigger it, it would save over two minutes in a run.