Time and time again we find big-screen heroes and heroines getting a little too cozy with the enemy. Had they just taken a moment to examine the situation, charisma and good looks aside, perhaps they would have noticed all the red flags signaling that they’re walking right into a relationship trap. In this week's House at the End of the Street Ryan (Max Thieriot) is a guy Elissa (Jennifer Lawrence) knows has a troubled past, but is still drawn to. But is he a killer? Here, we bring the big screen’s most glaring sadistic significant other warning signs.