Jaws
The only movie that truly put a real fear into me. I was prolly only about 5 or 6 when I watched it for the 1st time at my grandma's house. Seriously, almost as soon as the credits rolled, my Dad comes in and tells me we're going fishing (in the boat). Obviously, I didn't want to go and said so, but ended up going anyway...but I surely kept a watchful eye on the murky water underneath the boat that day and for awhile after. Logically I knew the Gulf of Mexico isn't home to great whites, but the fear was irrational.