I guess it depends on how you define a bad trip. I've certainly had a few, though not too many considering the total amount of trips I've had. But like many negative experiences, they tend to stick out like a sore thumb whenever you concentrate and reflect on it. So I try not to delve into those things too deeply after I gain whatever usefulness I can out of it, even though it does stay in the back of my mind most of the time. When I went through really bad times, I realized that the bright side is what ends up mattering the most.
Bad trips aren't any different to me. I've felt like I was dying on some of those trips; but I also felt like I was dying more so when I was sober and going through hell too. Looking at both of those set of events now, neither are bad at all if I look at it in a certain point of view. I became the better for it afterwards, so in a way I guess it wasn't really bad? This is the understanding I came to after getting plenty of insights here on BL.
For me, a "bad" trip (with horrifying visuals) would only occur or recur when I was in a negative mindset. Thinking back on it currently, I'm pretty sure it stems from my normal, sober thoughts that occasionally worries about certain things. For example, I sometimes had sober, mental visions of myself getting in a bad car accident and getting squashed like a pancake, and lo and behold I got into a pretty bad accident last year which wasn't through a fault of mine. And I think these types of worries would manifest during some of those past lsd trips and then get taken to a whole new level, but only when I was already in a negative or stressed out mindset.
The thing is that I've always been quick to recover from bad trips, or even bad events in life, since those bad trips are quite insignificant compared to the crap I dealt with while sober. So while they were certainly bad trips at the time, looking at it now they seem pretty weak.
Oh noez, bad hallucinationz! Imma dyin'!
Even though I'm really not...
Zz...