It was just like Tieria to fuck around with him like that. To just... issue an ultimatum like that and then expect some sort of gratitude for then turning around and saying 'I changed my mind'. If Tieria wanted him to work with - for his mind whispered - him, then he was going about it the wrong way. Michael felt like a puppet being jerked around on its strings, and it didn't sit well with him. Not at all.
He caught hold of the doorframe, bringing himself to a halt, keyed in the code, and floated inside. Hopefully he could work out most of his anger in there; he was pretty sure that punching out Tieria was against the rules, after all.