Yes, it was a threat.
Micheal's words were no different from a threat and this made the students even more curious. Would he really kill someone for saying stuff like that to his face or was he just bluffing?
In any case, the weird man with a mask on was already a creep, so there was no telling what he would do if his buttons were pushed. Better to stay away from trouble, right?
"Alright then," An uncomfortable Miss Stella spoke, clearing her throat to rid the air of the sudden tension. "Quite eventful indeed." She said and the students began to laugh lightly. "Anyway, there's one more who will introduce himself but I don't see him all of a sudden." She looked around. "He should be here any minute now but I guess he's running late for some reason."
"Who is it?" One of the students asked after raising their hand. "Is it somebody we know?"
"Yeah, because these people aren't very familiar to us." Another one said.
