"Only if it turns out that reality is actually nothing more than a holographic illusion created by the interplay of subatomic particles on a vast two-dimensional membrane."
This article covers a subject that has been deemed non-canon by either the author or the Back to the Future licensees, and thus should not be taken as a part of the "real" Back to the Future universe.
A barbed alarm clock
The barbed alarm clock was an invention by Doc Brown. Marty McFly surmised that it has spikes on top of the alarm clock to prevent people from hitting the snooze button.