When you look back on your childhood, what (hopefully) sticks out for you are the moments of boundless enthusiasm, how you used to get so much more excited about sleepovers, and that, at the drop of a hat, you could convince yourself that the floor was lava and fight with every ounce of your being to not touch it.
But it's also easy to forget the intense bouts of fear that came with being a little kid. Maybe it's because you valued your life that much more as a child, or it could be that you felt really small (because you physically were smaller) so everything seemed that much more intimidating. In any case, I don't recall ever being as freaked out by things as much as I did when I was younger.
And it's not like our favorite TV shows did much to help quell those fears, either. At least, not with these scenes. People in an AskReddit posted dark moments from kids' shows that still haunt them to this day.