You make one wrong call and it's pretty well over (at least in the 50 point game).
What about just losing a turn and keeping your hand?
It makes it frustrating in three or more player games when you are just sitting and waiting to lose while the others fight it out.
I would like to see a 100 point version introduced in between the 50 and 300 point versions. That would give players at least a chance to get back into a game after failing a test. The 300 point game is great if you have the time but the 50 is just a bit short for me.