[is_this_valid2]

A stunt person rides a motorcycle over a canyon; resulting in severe/fatal injury.

A stunt person's assistant materially assists a stunt person in riding a motorcycle over a canyon; resulting in severe/fatal injury.

In which case have whose rights been violated? Who is liable for the loss?

Should the eulogy for a stunt fatality be fundamentally different than for a person who accidentally caused self-harm through risky substance use?

[is_this_valid2]

Speaking of liberty to take risk and live TV, the film "Hot Rod" (2007) may provide some insight into what's going on in the mind of a person who is taking unnecessary risks for: acceptance (oxytocin) and excitement (adrenaline); though it doesn't provide any guidance as to how to avoid counterproductively reinforcing risky behaviors.

Keep in mind that these are all paid actors just following orders.

Is substance abuse intentional self-harm (suicide is legal) or a maybe-misguided attempt to pursue Happiness and end suffering?

How would you help Rod make better decisions? If Rod is not infringing rights, is Rod committing a crime by performing dangerous stunts?

Stunting is generally not medically useful.