Launching of the Tips during landing

It was a formation of 4 aircraft that were about to land and the one in fourth position was very low on fuel and for some reason the brake’s micro didn’t work leaving him without braking.

By radio, he communicated that he was going to use the hook to into the barrier with the hook and when he pressed the button to release the hook he erroneously pressed the release of the wing tip tanks instead, both buttons are next to each other and he was attempting to do blindly, he had three aircraft in front sine all were landing in formation, when he pushed the button, he heard a knock and with the corner of his eye he saw how the wing tip tanks went flying out, landing outside the runway with the bad fortune that one of them, the left one, exploded in fire.