I would +rep you 100 times right now if it were possible. Indeed, the drum fill, also known as the
Amen Break should be familiar to anyone who has listened to music in the last 30 or so years.
And yes, Ubik is a reference to Dick (the author you sick bastards

.) I'm a big fan of his work. 'Tis a good read, much like the rest of his work!
Edit: Thought I'd add this, my first taste of the Amen Break from the 90's, takes me back to my youth living in London. Doesn't sound quite the same but rest assured that it is the sample used for the drums.