Quote Originally Posted by KageTokage View Post
I've also noticed I'm routinely getting stunned in place by...something on the survival course where you're running in a circle.

It always seems to happen when the new obstacles are spawning in after a lap is completed so I'm assuming it's related to that, though the why of it eludes me.
The sliding bumpers have a stun aura in their hitbox, it becomes active the moment a new one spawns. If one spawns directly on top of you, you'll instantly get stunned.

Because the course is fairly easy and a lot of the initial mechanics are scripted, if you're very consistent then your path might just happen to coincide with one of the bumpers spawning. This happened to me a couple of times too, always on roughly the second lap if you stick close to the inside curve.