Answer:
Bad weed trip? i think you got the wrong drug my friend...First of all you dont get "bad weed trip" the correct term for it is HIGH..and high is not bad its good.. how can you tell if your high? if you are a first time smoker the feeling wont be as intense as the second one. but it really depends on how sticky icky the MJ is...this question can only be answered by experiencing it :)
In response to the person who said there is no such thing is a 'bad weed trip', your wrong. The causes of a bad trip when getting high is usually the paranoia you feel before smoking. It makes your trip full of anxiety, panic, etc. So if your a beginner smoker, never EVER try your first time/couple times at a place that will make you have doubts about getting caught, make you paranoid, or worried cause it'll most likely result in you have a horrible time. When you have a bad trip, believeeee me you will know.