NBC.com

SPIDER HEAD

The brother and sister team of Jennifer & Mitchell Tannis had to place their heads into a Plexi-box built-for-two filled with hundreds upon hundreds of spiders. Once inside they would have to rely upon each other as they passed keys back and forth in order to escape from the Spider Helmet.

FEAR FACTOR: Tell me how you were feeling.

JENNIFER TANNIS: Spiders are my ultimate fear. They are the only thing I've never been able to deal with in my entire life.

MITCHELL TANNIS: As soon as I saw the spiders in there, I freaked out. I looked over at my sister, and I saw tears boiling up inside her and that's when the fear entered me. I wasn't afraid for my safety but for my sister and how she was going to handle it. The stunt was no longer about me. I knew I could do it. I wasn't even thinking about the spiders, I was too focused on keeping Jennifer calm, and keeping her in the game.

JENNIFER TANNIS: I was freaking out. When I stuck my head into the helmet I had no idea what I was getting myself into. I felt a spider hit the top of my head and it was a big one. Right away I felt about three spiders, right on my face. And one a them was crawling across me, making a web. An adrenaline rush shot right through me, it was crazy. I have never felt that way before. I heard my brother's voice and I knew he was in the same position as me. I tried to glance over to him, but I couldn't, because the anxiety had built up so much. I started crying again and the tears welled up so that I couldn't really see anything.

MITCHELL TANNIS: I just kept staring at Jennifer. I just wanted her to know that she wasn't going to die. The spiders where crawling all over my head and I was freakin' out and I'm lookin' at her and I just wanted her to look at me. I just wanted us to make eye contact. I wanted her to know that nothing's going to happen to us. I wanted her to know that we have a chance of winning this.