The 'bystander' quoted nails it. Will credit him/her as showing profound wisdom, though at the same time he or she merely states the bleedin' obvious.
Was down in Pattaya a while ago on a very, very rare visit and god, I needed the break. Sitting in cafe....at 3pm.... just about where this incident appears to have occurred, with my back to the road outside. Heard very loud commotion behind me as two falang fellas seemed to get into heated bust-up. My Thai family seated with me got all excited and watched it all with fascination, but I just felt despair, not bothering to turn around, wondering exactly the same thing as the 'bystander'.
(I assume tourists involved, as both parties had families, who respectively screamed like mad at the two to quit it....which they eventually did. But I thought, sadly, of how it may have ruined their holidays.)