I do not approve this message, which is hard given that it has honest intent:

-Multiple hits is extremely safe. Arguably, LSD is one of the safest drugs known to man, and probably the safest recreational drug. As far as use goes, you'll get more long term ill effects from sugar than LSD ffs. Back in the 60s tabs were from 500-1000µg each, and sometimes people took multiple. Today a stronger tab usually is around 100µg, and to get a normal full effected but still weak trip (which is extremely strong as LSD is an extremely strong drug) starts at 200µg so most people will want to take 2 tabs minimum or they will get effects which Korberos describes.

-You do get crazy visuals more than than any other drug, with the exception of ones that make you fly off into another universe like DMT, which imho shouldn't be compared. You can get visuals like the bottom left cell of the comic, if those type of visuals make you comfortable and happy. You will most likely not get visuals like the bottom right cell as those visual look not fun and intrusive. Most visuals are more like you can look at a picture and see it moving similar to the harry potter universe, but for me more like a hollogram (multiple frames, not smooth motion). Also, other common visuals are breathing which is like everything is weaving around.

-Walking around in a public area under the influence is extremely dangerous and I do not recommend it, or at least keep in private until you are a skilled enough to know what dose strength you need to keep the trip weak enough, much like Korberos says. Most people i know who trip in public take half a tab, or a tab if it is weaker, which explains Korberos' thought process on dose size.

-Regarding overdosing, I do not know of a single person in history who has been recorded overdosing from LSD. However, that doesn't mean it isn't impossible. People in the past have taken thumb prints and have been just fine, which is on the strength level of 100-200 tabs at once, or around 100-200x the strength Korberos describes. I'm obviously, not recommending this, just stating the facts.

And for a backup source of information to make it a bit more clear: http://en.wikipedia.org/wiki/File:Drug_danger_and_dependence.png