<a href="https://en.wikipedia.org/wiki/Albert_Hofmann" id="mw3A" rel="mw:WikiLink" title="Albert Hofmann">Albert Hofmann</a> accidentally discovers the hallucinogenic effects of the research drug <a href="https://en.wikipedia.org/wiki/LSD" id="mw3Q" rel="mw:WikiLink" title="LSD">LSD</a>. He intentionally takes the drug three days later on <a href="https://en.wikipedia.org/wiki/April_19" id="mw3g" rel="mw:WikiLink" title="April 19">April 19</a>.