Hi, yesterday I went watch fast five in IMAX. Halfway during the movie, I got lightheaded and had heart palpitations and a racing heart. I ended up leaving but they didn t stop. I had to make about a 2 hour drive home so my mom drove us. We ended up pulling over the side of interstate because I literally felt like I was having a heart attack. I seriously thought I was going to die. I had to keep fidegting because that seemed to help. We finally got bak on the road but had to exit 3 more times. When we made it back I still felt bad. I started feeling better when I was talking with my parents at their table. We decided to watch tv but it started again. I again concentrated on talking to my mom and it stopped. She drove me home and I had tightness and soreness in my body including my chest. I went to bed right away hoping it would help. Today I dont have heart palpitations or lightheadedness but still feel sore and my chest feels tight. now I m terrified to watch tv or movies. What could have caused this? I should mention that before the episode, I did wake up extremely early to watch the royal wedding so I was extremely tired. I should also mention that I can t watch 3d movies because they give me heart palpitations and lightheadedness. I just want to know why it did that so I can relax my nerves and move on. Thanks.