For some 18 years I was a private investigator working with many major insurance companies. You can not even begin to believe the 'accidents' that I had to work.
Many were explained by the 'injured party' to have happened because some fellow employee/family member/friend, etc. decided to come in and either throw something on the floor that scared the individual, or would even slip up behind them and goose them in the side, etc. Results were quite often catastrophic to say the least. Had quite a few resulting in death!
If only I still had my photographs I could post them and let them tell the story. I will state that it is very dangerous to be in or around a fork lift is being used in any of the Big Box stores on the opposite lane from which you are shopping ... do you ever look up at the top of the storage racks and see the netting to "
prevent" what the industry refers to as 'push overs?' I still cannot understand their idea of putting killer objects like air compressors, vises, toolboxes, etc. up there! Ouch, big time headache!!!
I have a bell on my door that is impossible to open and not ring the bell. Heck, the idea above about a light is a good one, but don't let it be the main light. A loud buzzer is cheap and easy to install using a light beam switch like the 'safety beam' across most garage doors. Be sure to install it high enough that the family dog, or cat, doesn't trip it all the time. DAMHIKT!
BTW, glad you were not injured by the skew or the blank and it's now deadly edges.