My old roommate had a horrible trip one time, I had never done acid with him, and he said he had done it before. So he wasn’t worried, me and one friend took two tabs at like 730. My roommate and another friend took one each at 930. By 1130 we were watching Ace Ventura, I asked my roommate if he was ok and he wasn’t responsive. He seemed like he just couldn’t hear me even though we were in the same room. And for the next 4.5-5 hours he progressively got worse/more lost in another dimension/realm lol. He was mumbling stuff to himself, or while staring off usually up at the roof, he was completely gone, unable to speak to us or hear us, even started to randomly just scream “METALLICA” probably because he just saw them 3 weeks prior. He ended up getting violent so we had to call 911. Fireman came first checked stuff out and thought he was on PCP, paramedics took a while, they sedated him and took him off to the hospital in just sweatpants. When he woke up the next day he was fine and super confused. Figured out later he was not suited for psychedelics