Actually, that's something not too many people talk about. The case with me (and a good amount of friends) is that the first few times you get high, your not familiar with the high so you get caught up in either paranoia, or whatever worries you normally. The thing is, the more you keep smoking and get used to it, the more you'll be able to just go with the flow. You'll see, once you know what to expect, you'll enjoy yourself a lot more, you'll think freely, feel euphoric and truly take the ride.