Alya backed down and looked away, everyone remembered what happened to Alix... It was when they were first asked to do something, their second meeting. Alix didn't like what they had to do, but M said she had to or else something bad would happen to her. Alix didn't listen, and snapped back at M telling her that she could go burn in Hell...
It didn't end well for her the next day. She was going to skate to school, but her rollerblades were broken and she lost a bet to Kim, since she couldn't do it without her rollerblades. Then the actual trashed stuck. She got hit by a car. Alix was walking back to her house, when a car came out of nowhere and sent her flying through the air, landing in the middle of the busy intersection.
Because of that, people swerved to avoid her and it ended up being one big car crash. Alix didn't see it though, since she passed out from the pain a few seconds after she hit the concrete. Nobody was severely injured except for her, she broke her leg, sprained her ankle on the leg that wasn't broken, broke an arm, fractured her wrist on the other one, broke her ribs, and got a major concussion from the impact on her head when she landed.
The doctors said that it was a miracle that she didn't have any amnesia from the blow... and that she even survived. After that, everyone took M Siriusly and never snapped back or complained to her again. Of course they complained about it when they left, and cursed her mentally when they met. M knew this of course, they just don't know that she did.