I don't mean to derail the amusement but you should have ear plugs and safety glasses in there.

I worked in the audio industry for 12 years and through a combination of overexposure, being in one too many rock wannabee bands and genetics, I now have tinnitus. The effects vary from person to person but right now I hear a constant ring in both ears, right at about 10khz. It comes and goes but other sufferers describe a range of symptoms from ringing or buzzing all the way to jet engine-like roaring.
Believe it or not, some sufferers can become suicidal. I'm not anywhere near that but I now carry disposable ear plugs everywhere. You would be surprised how often you get exposed to damaging sound levels. I also work with several machinists with highly compromised hearing. One guy can no longer hear anything above 8khz. He can barely perceive cymbals in a drum set or cell phone ring tones.

Now, safety glasses. My wife is an Optometrist. You would think looking through her medical books at the endless variety of eye injuries would be enough for me to get religion. Nope. Sure enough, like most of us, I had to have a first hand experience to convince me.
Up on the roof I was trimming a tree and a branch bent back and smacked me in the face. I suffered a "corneal abrasion" and the pain was completely imobillizing. I could barely climb down the ladder to get off the roof.

Now you wouldn't go to the shooting range without either ear and eye protection (well, some do) so why not spend $15 on safety glasses and a handful of ear plugs?
This thread is about "indispensible tools". Consider these "safety" tools.

For anything electrical, a cheap multimeter helps a lot.

Acetylene apparently was invented just to go into balloons on the end of a loooong stick and be held over a lit candle.

Somewhere, I think at the beginning of a chapter in one of those post-apocalyptic survival novels like "Atlas Shrugged" or "Lucifer's Hammer", there's a description of the most basic real metal tool with which (at least theoretically speaking) all other tools can be made. It might be a hammer, or it might be a file. I can't remember. Anway, I'd give somebody an original authentic "beany copter" (if I had one) to know the exact reference for that description.

Thank you.

I'm pretty sure it wouldn't be Atlas Shrugged.

And oxygen/acetylene is even better, but you're gonna need a longer stick...