That's an interesting question. I suppose quick here may be an adjective rather than an adverb. ie Come!
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meteorquake it ends up feeling as if it's an adverb.(1) There is an interesting usage note at http://education.yahoo.com/reference/dictionary/entry/quick
Ivanhr http://www.englisch-hilfen.de/en/grammar/adverbien2.htm (Very interesting and useful information! Thanks for this link!
ozzourti"quick" is sometimes used in conjunction with "real" in spoken language: I did it real quick.