Honestly, i think the fact he poured the water on it might have had an impact on the result. You can't have a nive even heat repartition by pouring it, and depending on how heavy he poured it water has weight that will press on the ABS.
Hence i would temper it with, never pour hot water on your hard bought RS armor, but immersing might still be an option.
Edit: that's still a crazy, scary pic man...