Before checking out ''Saw IV'' this weekend, check out our scary-movie survivor's guide By Marc Vera | Oct 24, 2007 Just say no! Being a drug addict sucks just ask Amanda (Shawnee Smith, pictured), from Saw. There's never enough money for that next high, and worse, you run the risk of being abducted by Jigsaw, who preys on the weak-willed and pathetic. But if you don't mind slicing into people to find the key that'll take that modified bear trap off your head, you'll be just fine. Don't trust the locals Embrace the local culture while vacationing in South America. Just be sure you know what you're drinking and who your friends are, or else you could end up like the poor saps in Turistas, robbed of their possessions and left struggling for their lives at a ''friend's'' house. Brazil isn't looking so grand anymore, is it? When exploring nature, come prepared Spelunking with your friends can be a great bonding experience just be sure you carry plenty of light and a trusty map, unlike the ladies of The Descent. Because, you know, it would suck to have to claw your way out of a pitch-black underground hell with Bat Boy-looking predators on your tail. Don't piss off truck drivers If you want to play around on the CB while driving cross-country, like Fuller (Steve Zahn, pictured) and Lewis (Paul Walker) in 2001's Joy Ride, you better be prepared to deal with the psycho trucker that'll want to rip your jaw off for teasing him. Remember that old saying about curiosity... Getting run off a country road by a lunatic is scary; later gawking at said lunatic while he's dumping bodies down a chute is just plain stupid. But that's exactly what Darry (Justin Long) and Trish (Gina Philips) did in Jeepers Creepers (2001), to their eventual horror.