I thought a folding machete would make a good Halloween weapon. I used a five Euro machete from my local discount hardware store, replaced the handle with a piece of marine grade plywood, then I made handle with a strong rubber powered blade blocking mechanism (Laguoile style).
It works quite good! The looong handle turns the machete into a far mor efficient weapon, and allows Zombie decapitations from a far longer distance.
As the blade does not fully lock (but won't accidentially fold), the knife can be carried in public here in Germany with no permit and for no specific reason.