One puzzle about the Chilean rescue

[BadBob]

There's a video of the last rescuer leaving the Chilean mine after the heroic rescue on the BBC here. A magnificent effort but I did wonder, who or what causes the camera to wobble 4 seconds in if he's the last to leave? Just seems a bit odd...

Edited by BadBob on Thursday 14th October 17:43

[BadBob]

Can't have been the medics, he was the last rescuer/medic leaving. It's all solid rock too (or appears to be) not a flexible wooden floor.