LSD is probably the most powerful psychoactive drug known to mankind (along with DMT) and is NOT something to do just for pure pleasure. Marijuana is a toy. LSD is a tool. People who are serious about taking LSD and do it properly are not those looking for a fun time, but those looking for an expansion of their consciousness, to think about things in new perspectives, and see what your mind can do to you. If you think that you can handle LSD because you can handle marijuana, you are in for a big surprise. Marijuana is a psychedelic like LSD is, but faaaar less powerful in every dimention, not only in your sensory perception (shapes, objects, colors, and patterns change, build, and communicate with one another and yourself, you can taste colors, see the music, etc) but in all the things you think about, which is, to me as an experienced tripper, the most intense and significant part of tripping. You feel like you are thinking about ten things at once. Then those ten thoughts branch out ten more thoughts each and continue on, connecting with other ideas, making this huge visual web of thoughts in my mind. Keep in mind that for everyone, their trip will be different as well, so do not take my very basic description of the experience as what you WILL experience, it most likely isn't. LSD is a drug that is very different to every individual. If you are sure you want to take the next step in mind expansion, MAKE SURE YOU ARE READY. I cannot stress this enough, because if you are not, you will be in hell rather than heaven. Read up, study, and prepare yourself. It is an experience you will NEVER forget, regardless of whether or not your trip is good or bad.