[Cletus.D.Yokel]

Just throw one of these in the glove box.
Available at hardware stores everywhere, in the paint aisle.
Makes an impressive weapon, too...4-inches of exposed razor-edge knife:

[meyer]

I’d like that, but with a nice protective sheath. Hate to have it cutting up my registration and proof of insurance. :)

[stylin19a]

i keep a ball peen hammer on the floor.
I’ll get one of those to keep it company.