Pulled from first Lucid Dream

About a year ago I had my first Lucid dream after using certain techniques. Due to getting busy I have gotten out of the lucid routine, but I'm going back now to try again. What I would like though is to learn how to not get pulled out of the dream again.

The lucid dream I had was obtained by looking at my watch, time jumped around like crazy and something in my brain clicked and I knew I was dreaming. Problem was once I said to myself "I'm dreaming!" The dream tunneled, things around me got fuzzy, and I was being pulled away from the scene until I woke up. The only way to describe it is that it felt like I got sucked out of the dream through a hole. I was mad afterword because I didn't get to do anything. never happened again, but I'm working at it now.

What I want to know is why this happened, and how can I stay in my lucid dream without being sucked out. I want to experience it, not notice I'm dreaming then wake up.

Usually when you become lucid, your brain usually tries to wake you up. However, there are way to counter this, and they are called dream stabilization techniques. Here are some popular ones.
1. Touch: Touch everything around you the minute you become lucid Touch the floor, the walls, buildings, grass, act. This will help "anchor" yourself in a dream.
2. Spinning: Once a dream starts to look blurry or less vivid, spin around rapidly with your arms out for a good 10-20 seconds. You might end up in a completely different place, but the dream will re-stabilize.
3. Look down at your hands and yell "Clarity Now!" when you look up, things should look more vivid and stable.
4. Diving: When a dream is beginning to end, or whenever, dive into the ground. You will probably reach complete blackness, but than a completely new dream will open up. This is similar to DEILD in the sense that you can chain dreams.
5. Rubbing Hands: If you become lucid in a blurry dream, or the dream is ending, rub your hands vigorously and the dreamscape will re-stabilize.

Note that not all of these techniques work for everyone! Try each one to see what works best for you. Hope this helped!