then, inside, since it is a science class crazied a gas and basically blew up the pudge kin.pumpkin. >> so they take a glass of water, put it inside the pumpkin and drop some calcium cash ides into the water to make sure the top is security will placed on the pumpkin so when it does explode, when the gas explodes, it's shoots out the eyes and mouth. they give it a few seconds to activate to react. what you saw them doing in the back was putting a barbecue lighter in, and then they lit it, and that created the explosion. [ laughter ] >>> it's time for our runner-up on the countdown. number two, and the story we uncovered behind the video. now when people travel, even if they don't have pets, sometimes they want a house sitter it come over to pick up the mail, dust. you know, just make the house looked occupied. this guy says he travels a lot for work. so he wanted to check in on his house sitter to see what she was up to. >> uko. >> but she's finished sniffing the clean laundry and my favorite shirts. walking around in her underwear. >> yes. >> oh, and then he posted it. >> of