Replying to Legal, cheap Halloween pranks!!

ok guys so here the deal, I live in a neighborhood full of stuck up pricks, and every year, I do my best to scare the hell out of people. Clown masks, blood packets, I've done it all. However, this year I want to go ABOVE AND BEYOND!! I bought myself a Hannibal lecter mask from the local party America, but that's just step one. For the rest of the costume, I want to go completely fucking nuts. I'm talking chainsaws (with the blades off of course), the works, however I am on a budget!! What kind of ideas do you guys have that won't get me arrested, and are relatively cheap? I don't just want to chase people or jump out from behind bushes, I want to really make this year count. So come on NS!!! give me your best ideas!