It is not normal to behave aggressively towards someone, get within range to hit them, and then repeatedly close in when the other person tries to backs away. It is not normal for cis people and it is not normal for trans people.
When someone does those things, it generally signals they intend to start a fight.
Umami is the fifth flavor. This paper is about the sixth, which doesn't seem to have a name other than "ammonium chloride".