Hey and welcome to the cannabis culture. We are glad to have you and I am sorry about how your first experience turned out. Puking has happened to a few people I know when they where toking. Usually you puke when you have some really bad weed and you smoke a lot of it or it is your first time and your body is showing its way of rejecting the THC. Your friend needs to take it slow though, two panic attacks on back to back days is not good. I can't think of a way that cannabis can give you panic attacks unless it was laced (but you said it wasnt so that rules that out) or he just had way too much. I hope you continue to toke up and enjoy the sweet erb that so few people really know the truth about.

Happy Toking :rasta: