Been messing around on the demo, and I think I may have stumbled across some things.
1. Infinite Throw
I came across this on Crimson Cape during the Aka Manto battle. I had the Stake Knife and Kendo Mask equipped going into it, with Flashlight and Corpus Dust in the inventory. When the battle began, the Kendo Mask had vanished, but I still had everything else. I threw the Flashlight at Aka Manto to weaken it, but then noticed it back in my inventory. As it turns out, I was able to throw the item multiple times in order to weaken them all the way down to 0 strength. I guess it's powerless under a pile of flashlights, but I'm fairly sure it wasn't intentional.
2. Crashing Throw
During the beginning portion of the Bathroom Ghost encounter in School Scissors, while the text is over a blank screen, I was able to pull up the card for the Baseball Bat that I had equipped. I noticed it had the Throw icon, so I threw it... and... well, the game broke. I guess this is why you shouldn't throw bats around indoors.
Regardless, looking forward to the full release.