What was your first chemical reaction?
Probably cellular respiration. Or it could have been neurotransmitters binding to receptor proteins. It was a long time ago so I am not too sure which came first.
What was the worst thing that happened to you?
In 2013, when Dr. Otto Octavius deviously succeeded in transferring his conciousness into Peter Parker's body while simultaneously transferring Peter's conciousness into his own (Otto's) dying body, which perished shortly thereafter (Amazing Spider-man #700).
What is the greatest lesson you have learned?
For any doctrine/idea/assertion/belief, there will never be a shortage of arguments to support it.
The "Law of Infinite Cornucopia" - Leszek Kolakowski
Major: Chemistry, Human Physiology