@cabinbuilder
A MMI is a multiple mini interview. It's like interview speed dating. You get 1-2 minutes to read a (usually ethical) prompt, and then you hear a gong, and then you walk into a room with a moderator there. You talk about the ethical scenario, and the stance you would take on it. You get ~8-12 minutes to discuss the scenario/answer followup questions, and then you hear another gong and you leave the room. Most MMI's have about 8 stations.
The one I did only had 3 stations. I wish I did better on it. I've never done ANYTHING like this before and I was really off my game at the first station, but I feel like I did better at the second station. The third station was a 1:1 interview, and at that point the ethical questions had ended.