Cheaper By The Dozen 2 - Seeing Triple Splashes
At 1:13:15 into the movie, the kid is just about to do a cannonball into the water. Watch the splash carefully... see anything weird? The one splash has two other splashes right next to it that are *exactly* alike! It was really unsettling the first time I watched it, and doing frame-skip confirmed the creepy triple splash in that scene.