I have seen the same wing bending test for the A380 at the Airbus factory in Chester. It is jaw-dropping.
The engineers have to climb into the wing to fit rivets and electrical wires. Sometimes it takes 20 minutes to crawl to the spot they want. Since they take a portable lamp with them, a popular prank was to switch someone's light off when they were well inside the wing.
Another anecdote from the Airbus engineer was Boeing had to cut a 747 wing apart because their engineer got stuck in there working on a wing. Can't verify this claim though.
The engineers have to climb into the wing to fit rivets and electrical wires. Sometimes it takes 20 minutes to crawl to the spot they want. Since they take a portable lamp with them, a popular prank was to switch someone's light off when they were well inside the wing.
Another anecdote from the Airbus engineer was Boeing had to cut a 747 wing apart because their engineer got stuck in there working on a wing. Can't verify this claim though.