Note how similar but different these two drum fills are that Dave played with Nirvana. The first fill is taken from “Smells Like Teen Spirit” leading into the chorus, while the second fill is taken from “Come As You Are” leading back into the second verse.

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In essence beats 3 and 4 of both drum fills are the same piece of drumming language. Dave has made that “lick” a part of his drumming vocabulary and is comfortable leading into and out of it. You can make your own variations on these fills to get comfortable enough with the concept that it becomes part of your drumming vocabulary.