I can understand that the husband might be upset because of an ambulance bill that wasn't strictly necessary.
But this wasn't a heat of the moment freak-out, which I could see. He made the effort to look up the number of the university office, and then phoned them to yell at them, badly enough that they called the police as a cautionary measure. That's deliberate aggression, not a momentary panic.
But on the flip side - does he really think that the appropriate response when someone suddenly goes into convulsions is for the surrounding people to toss a blanket over them, wait to see if they regain consciousness and coherency and then ask what medical help they need, in case it's not actually that serious? Keeping in mind that the random person on the street is generally not familiar with seizures in general, and is not medically competent to diagnose the difference between a benign seizure and a life threatening illness.
Or, for that matter, taking the time to get authority to find the contact information for the next of kin from university records, phoning up the next of kin and hoping that they answer, so they can say "Your wife had a seizure and is unconscious on the floor. What would you like us to do?"