Advisory Management Consulting Internship

I applied through school, got an invitation for first round interviews. There was a pre-dinner, in which you meet your interviewers and also potential people you may be working with. I was told that there wasn't going to be casing or much technicals first round, just behavioral but I guess it was just up to the interviewer. It was a one-on-one interview with a partner and was definitely a stress test type of situation. He was nice at the dinner but did a complete 180 during the interview. Wasn't mean, but definitely very intense, took out his phone to time my one-minute elevator pitch, did a mini-case, and then some behavioral. Didn't get past first round, unfortunately, but it was nevertheless a great experience.