Superstitions are hard to shake. After all, who doesn't feel a little luckier when they find a penny on the sidewalk (heads up, of course)? Superstitious rituals tend to be most powerful when there's underlying fear and anxiety involved. Would you brazenly walk under a ladder on Friday the 13th? A lot of people wouldn't.
Unsurprisingly, Americans have many superstitions when they drive. According to a recent national survey by the car insurance marketplace Netquote, holding your breath through tunnels is the most common driving superstition. That may make you wonder — why do people hold their breath in a tunnel?