Don't do drugs

It was such a random death. Heartbreaking, really. He was a pretty good Kyle Reese and I think he captured Chemo to a T.

I've never heard of a car without a handbrake

Drugs are bad for you

He did not forget to put it in park.

"In 2016, the automotive blog Jalopnik reported that the Jeep was among one of 1.1 million vehicles that had been recalled about two months before Yelchin’s death because of a confusing gear shifter that could cause the car to roll away unexpectedly. According to former Washington Post reporter Jeff Guo:

[In 2015], NHTSA began investigating the unconventional gearstick design on these cars, which was causing crashes because drivers were mistakenly shifting to neutral when they thought they were shifting to park.
With a regular gearstick, drivers choose a transmission option (park, reverse, neutral, drive, etc.) by moving the stick into the corresponding notch or detent. Drivers can feel the stick settle into position.
But a new, different, design was used in the cars affected by the recall, which include certain recent models of the Chrysler 300, Dodge Charger, and Jeep Grand Cherokee."

https://www.washingtonpost.com/news/arts-and-entertainment/wp/2018/03/22/actor-anton-yelchin-was-crushed-to-death-by-his-suv-his-parents-just-settled-with-fiat-chrysler/

That is how he died. Try doing some research before you post.