Are you being judgemental to say this is not reverent and not honoring to the Lord?
Ever hear of the Great Awakening? The Methodist movement? These featured all manner of peculiar outbursts, including laughing and shouting. Many called Wesley's early followers the "Shouting Methodists". The expansion of the new testament church throughout history often seems to be accompanied by strange manifestations.
It's not my job to judge the reverence of others.
I've been following this thread wih interest.
You've been rather quick to opine as to what is or is not acceptable, yet not nearly so quick to respond to the requests to back up your assertions with scripture, nor to reply to those who do.
To this point, I am left with the distinct impression you are prescribing your personal preferences while criticizing those that don't share them.
You ask, Are you capable of discernment? I would gently suggest applying discernment to differentiate the spirit of David from that of Michal.