Hey Dan! Yes the 2nd gen can be intimidating especially at low speeds on rough terrain so I can understand the uncertainty that started your anxiety attack! Yes, I've been down myself and discovered I'm not invincible or unbreakable! And, as we get older our bodies can't seem to keep up with our minds and won't do what we think they can.
You'll know when the time is right to master the new beast! Perhaps when it is drier and warmer, perhaps today, only you hold that answer. As far as your episode goes just remember it is a normal thing to experience a panic attack and all that happened is something triggered you to remember a bad experience. It happens to a lot of us, if not all of us at times. To this day I still have combat related episodes and it's been 44 years. The key is knowing what they are and that it is just your mind reminding itself of possible situations that could happen.
Dragonslayer thanks for the insight to your screen name! I just assumed it meant you had been on the tail of the dragon more than once!