So Effie Lied about the stunt?
At 23 minutes into this last episode Effie comes to Jason and tells him straight up, "I found a way to do the stunt the way you want."
Then at the dinner with Len she straight up says they aren't doing the flip and are changing things?
What the heck? Why would she do that? I mean it's one thing to explain to Jason they have to scale back, but she straight up LIED to his face telling him that they could do it and then waiting until the last minute to ambush him with Len and everyone at the dinner table on top of knowing that they wouldn't have the time to change it then and he would have no choice but to go with how she wanted to do it now.
On top of this she was lying to Len, acting like Jason was "nuts" and using their phone call (Len had no idea that she told Jason they could do it the way he wanted or that entire conversation, which is what Jason was talking about).
It seems like Effie just straight up wants to watch Jason fail now.