When these dayglo jackets were introduced at LHR, one pilot had a suitcase fall on his nut when passing the rear hold- Jacket didn't save him did it! I tried putting mine on at the top of the airstairs during a windy day and nearly took off in the breeze. As I landed on the tarmac I couldn't understand what anyone was saying as I was lying injured on the ground until I realised my "deafness" was caused by having my ear protectors forced into my brain by the fall.
Safety equipment has its own risks!!