As the spacecraft descended, it sent back signals when critical events occurred: heat shield separation, parachute deployment, retro-rocket firing.

NPR: Mars Rover Marks Second Anniversary of Landing

They said that areas such as the shuttle's cabin door and parachute deployment areas were rigged to be operated by explosive systems and munitions experts have been deployed to deal with any debris suspected of presenting that risk.

CNN: Four compounds from shuttle can harm on contact

Premature deployment of his main or reserve parachute.

FORBES: What Were The Risks Of Felix Baumgartner's Jump?