I thought this too, I won&#x27;t deny it.  I suppose two counterpoints would be:<p>1) If you really can work days and days on end without feeling tired or feeling the need for sleep (as someone who works very, very excessive hours, I can safely say I spend most of that time <i>yearning</i> for my bed), in all likelihood you are going to come crashing down at some point;<p>2) You can definitely start hallucinating purely from lack of sleep, after &quot;only&quot; a couple of days, without the assistance of any hallucinogenic drugs.