Here is a little fact for all of you Doctor Who fans. The regenerations, first introduced in 1966 for the show, were modeled on bad LSD trips. The Doctors trips were designed to showcase the “hell and dank horror” of the hallucinogenic drug. The papers also revealed that the horrifying experience was to be as follows:
“an experience in which he relives some of the most unendurable moments of his long life, including the galactic war,”
So there we go, don’t do drugs, unless you are Timelord.