While reading an article, I encountered a sentence as follows:
Fast forward several years until increasing pain forced me off the court and X-rays revealed bone-on-bone arthritis in both knees. A sports medicine specialists suggested...
I can understand how "fast forward" was used as a verb in this sentence, but I do not know the grammar behind this. I assume this is not an imperative form as this sentence is followed by the story about the author's personal recollection. (I guess some phrase like Let's was omitted.) Could anyone tell me the grammar rule for to this sentence?