You searched for: “frenetic
frenetic, phrenetic
frenetic (fruh NET ik) (adjective)
Concerning an activity which is filled with excitement, liveliness, or confusion; wild or frantic: The celebration after the wedding was very loud and frenetic.
phrenetic (fruh NET ik) (adjective)
Relating to a mental disorder when someone is excessively anxious or agitated: William was admitted into the hospital because there were indications that he had phrenetic behaviors.

It was very sad, when Jerome, who was suffering from a phrenetic condition, started to become frenetic when he was in the crowd that was enjoying the sights and sounds of the circus.