There is a never ended quest between my two oldest kids, my husband and myself to try and scare each other.
Several months ago, my 2nd son was hiding out in a room from his brother. He kept opening the door and peeking out. I quietly walked up to the door, got my face right in the door, so when my son opened the door ever so slightly, I yelled "boo!" and boy did he jump. It was so funny. We all laughed pretty hard.
I guess that same son got my husband good by hiding behind his bed and jumping out at him.
You get the idea.
I was just now in my daughter's room saying good night. I gave her a kiss and backed up towards the door while blowing a kiss her way. As I turned around, there was my 2nd son, yelling "boo!" and scaring me.
He and I had a good laugh as we headed back to his room. I had just tucked him in and I thought he was in bed. Sneaky little boy.