I might have seen someone die

I was at school today and as I was heading to my class this girl suddenly ran into a fire extinguisher and fell into the ground. Her eyes were fully open and her mouth was kinda as well. A teacher came out and started shaking her and she was completely unresponsive. She looked so lifeless. They announced a hold for a medical emergency and we were made to go into our classrooms. My class was across the hall and I could hear the first responders using the AED on her and they ended up having to shock her heart. They were dong CPR for a long time but they eventually got her heart to start again and they got her on a stretcher and to the hospital. But ppl are saying that she’s in critical condition and she would be extremely lucky to survive the night. I just keep thinking about her face, replaying how she just collapsed onto the ground and thinking abt her. Like did I really just see her die right there in front of me. Idk why I just can’t stop thinking about it.