A Colorado witness at Castle Rock reported watching a series of nine arrow-shaped UFOs crossing the sky quickly, according to testimony in Case 80616 from the Mutual UFO Network (MUFON) witness reporting database.

The witness was walking across a parking lot at 11:25 p.m. on October 21, 2016, when the incident occurred.
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“I took notice of a very distinct horizontal grouping of nine arrows crossing the sky from the northwest to the southeast,” the witness stated.“The width of the arrow grouping was the width of my fist with a fully-extended arm. Each of the nine arrows would slightly vary their speed whereby each would slightly go ahead of another (exchanging leads with respect to each other) while all remaining in their general grouping (please see my illustration – shows the extent of the arrow lead-changing with one another). Each arrow would ever so slightly pulsate with no specific rhythm, making each arrow become more/less faint to make out.”