James Gasik
We don't talk about Pun-Pun
Oh I remember that. I don't watch CR, but my roommate does, and I happened to be in the room where he suddenly picked up a huge handful of dice to roll for the falling damage.So the rules cannot take everything into account and it is perfectly possible, even likely, that sometimes unforeseen edge cases crop up where blindly following the rules would produce particularly implausible outcomes. In such cases it is fine to overrule the rules, and I'd consider this to be one of GM's responsibilities.
But I don't think the example here is that, and I think it was a bad ruling. Some monsters being rather big is not a rare edge case; it is totally expected one and clearly codified in the rules. It was perfectly reasonable for Marisha to expect this to work.
And I even agree with Mercer, that it doesn't make much sense for the movement stopping to work on creatures that big, and that's why I put it on my houserule document that it doesn't, so that the player can make informed decisions on how to employ the feat or indeed whether to choose it in the first place.
This reminds me of another similar bad ruling of Mercer's (again on Marisha's expense,) where he ignored the normal fall rules after the player had already committed to the jump (correctly by the RAW) assuming that that the fall could not be lethal. Buddy, the moment to tell the player that the normal rules won't apply is before they jump!
(Of course what annoyed me more about that than the incident itself, was the internet reaction. There were a lot of "LOL Marisha so dumb" comments, even though her intuition of the rules governing the situation was perfectly correct, Matt just pulled the rug from under her. Smelled like misogyny. )
I even said "that is not how that works".
But I'm not passing judgement on Mr. Mercer. He is an entertainer. He is producing entertainment. In that instance, it was more entertaining to his audience to pick up a ton of dice and roll them, and I would presume all the actors on his show are fully onboard.
If this was done in a regular game I was in, however, there would be words.
