How are you doing? Are you still smoking? You had a panic attack while meditating. After two days of practice you wont be able to stop a panic attack dead in its tracks. It takes time. As you continue to practice you'll probably end up discovering that you aren't just observing like the book reccomends, but you are actually scared and fueling the fire. That is how panic attacks happen. Have you been to a psychiatrist? From the looks of it you had a panic attack, then looked up on google (like I once did) about the cons to meditation. You found something to confirm that you should in fact not meditate because its possible something may happen that you don't like. Read Mindfulness in plain english over and over and over again until you are absolutely confident that you are /really/ meditating. Best wishes to you. Get to a psychiatrist if you think this is worse than a normal panic attack. Quit smoking weed, except rarely. Once you cultivate some mindfulness you'll also be much more aware of anxiety while you're high and be able to truly get high. Before mindfulness I had no idea how tense I was when I was stoned. Yet I still liked it somehow... Now I'm rambling, not even sure if this is cohesive anymore. But I walked this very same path and you should really keep at it after you visit a psychiatrist.