Revealing mistake: When Rowdy shows up on his motorcycle to save Donna from the snake, the smoke coming out is very obviously being ejected from a machine outside the home.
Revealing mistake: When the baddie rises his hand to grab the frisbee with blades his hand is blatantly fake.
Revealing mistake: When Jade kills one of Romero's henchmen, the blood pack under his shirt is noticeable.
Revealing mistake: When Romero gets the harpoon stuck on his chest, he grabs the bulk underneath and you can tell that he squeezes the blood squib to pour the fake blood out.
Revealing mistake: When the Harpoon gets stuck on Romero's body, the pad underneath his shirt is noticeable.
Revealing mistake: When the skater (a dummy as a matter of fact) is blown away no blood or guts spill around.
Revealing mistake: Before the skater is blown away check his skinny and fluffy arms and hands, revealing he's been replaced by a dummy.
Revealing mistake: When the two Asian-American men are hanged upside down and shot on the tummy, they don't move, revealing they've been replaced by dummies. (00:03:20)
Revealing mistake: When Donna destroys the helicopter, the cable holding it is visible.