Talking of grabbing the handle reminds me of an incident that happened during my RAF days. Can't for the life of me remember which station I was at but they had Javelin squadrons there and I worked in the electronics center servicing AI17 interception radar. One day, I was on duty crew and was required to see off a visiting Jav. As it was raining, the crew decided to get aboard in the overnight hangar the aircraft was in. All went well until it was time to tow it out onto the flight line. As the plane reached the door, the navigator reached up to close the hood to stay dry.
Unfortunately, he put his hand up and through the seat ejection handle. Luckily, two of us saw what was about to happen and screamed at him to freeze.The Nav went white went he realized what he was about to do. I can't and don't want to imagine the mess we would have had to clean up if he had "closed the canopy"