Slider style EDC utility knife. Small, lightweight, and because the blades are cheap and easily replaced you can abuse them - cut on concrete, pry stuff, if it breaks the blade, not a big deal.
https://a.co/d/gouJDKV typical example but there’s lots of different ones.
Bonus - these blades are more expensive than most, but still cheap and last a lot longer than standard blades do https://a.co/d/bQj77Qz
https://www.helmet.beam.vt.edu/equestrian-helmet-ratings.html
This is a good place to start for helmets. They have the same sort of ratings for different sports so if nothing in the equestrian list looks good, you should check the bicycle list. Note that it’s not necessarily current for everything but it’s a good starting point.
Has to be Volcano (1997) by far. Has the best over the top scene :) https://youtu.be/R01bex9Ejvg?si=yAcwY7vGTxL0JD7s
I have one of those floating around here too, the thing I didn’t care for with that model was that the blade doesn’t stick out very far. The one-handed action is nice tho. The one I carry every day is this one https://a.co/d/29pk73c but it’s not currently available.