So... What IS considered a "compelling display"???
In the vast majority of cases... actions which necessitate intervention and subsequent detention by the police in order to ensure that an individual does not succesfully do what he has attempted to do, or threatened to do, and which constitutes an imminent danger to the life of himself or others.
Examples
Who exactly decides what is "compelling"???
Things that are sufficiently dangerous and reasonably within the capability of the individual.
An 80 year old indigent schizophrenic man in a wheelchair in Beaumont, Texas stating "I am going to blow up the Space Needle" is NOT compelling.
A 23 year old bi-polar man with two prior hospitalizations, a mother who committed suicide, a prior suicide attempt himself, and a history of beating his girlfriend calling the crisis line and saying "I am going to cut my girlfriend's throat and set our apartment complex on fire" IS compelling.
If say Mumwaldee gets in an argument with someone... is that compelling???
A verbal argument without realistic threats? No. Even if it is due to mental illness. At worst he is a public nuisance.
What if gets in fist fight with someone???
Depends on his history, how bad the fight is, what the circumstances are, etc. If he punches the girl at McDonalds in the face for not giving him a napkin, then runs into the parking lot screaming at the police to kill him, and they have to tase him to subdue him, arrest him and determine that he has not been taking his medication for three months, repeatedly hospitalized for the last five years, etc. Yes... that's compelling.
If the guy behind him at the Vikings game spills Coke on him and he turns around and punches him with no other aggravating issues... no, probabaly not. Although he will probably be charged with assault and lose his RKBA anyway.
Does he now lose he RKBA???
Depends.