What the thread found

• A sudden upward boom motion combined with an operator misstep on stairs can cause the rig to separate from the arm with force dangerous to spotters nearby
• When an operator trips or falls while wearing a Steadicam rig, the rig can disengage from the arm post and fly free
• High-speed vehicle-mounted rigs can detach when the arm hits terrain depressions and bounces upward at extreme speed
• To safely remove a sled from the arm without a stand nearby, an operator can rest the sled on their thigh while leaning into it while the focus puller holds the centerpost
• Operators falling have successfully protected expensive camera equipment by using their body as a cushion by falling forward or sideways onto their forehead and knee

Depends on

• The described incidents span multiple decades and different rig types, suggesting these are rare occurrences
• The specific circumstances of each incident vary widely, making it unclear what conditions make detachment most likely
• No systematic analysis of what causes detachment versus secure retention during operator falls

Parts

Arm Post

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