Robert is jumping a skydiving rig (Wonderhog) with a belly band and an empty reserve container. His curved pin is primed half way and he's using a 52-inch BASE pilot chute. After landing, a previous jumper said he watched Robert go somewhat head down and throw his pilot chute early. Robert then towed his inflated pilot chute to impact.
The speculation is he tightened his belly band down (after a final gear check by the jumper who went first) and this put too much tension on the main closing pin. Combined with an early pilot chute throw and the associated lack of snatch force this may have caused the pilot chute in tow. The irony here, according to the first jumper, is they had both recently discussed purchasing Velcro closed BASE containers but the cost was an issue.
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