Moved to pick up a pike while regenerating and (probably) being attacked on the second move of a fire bat and both I and the bat (probably) being hit by a fire lizard fire bolt and a ring of the vampire probably triggering on death. The animation froze halfway between squares and the game became unresponsive, though music continued as normal. It was in today's daily quest, if that helps. Sorry I don't have a screenshot-- the game reloaded when I went back to go take one partway through writing this (I shoulda used a new tab).