bizarro shape changing spikey daylight UFO

There are a bunch of daylight videos of bizarre shape-changing UFOs on YouTube (what did we ever do before YouTube?)
This one is obviously from South or Central America someplace, and doesn't really get interesting until about 1/2 through, when the whatever-it-is changes shape and becomes something that looks like some bizarre flying sea urchin or something.
Not being a video expert or anything, I can't say as to the validity of the footage, but if it's a fake, it's a damn good one, as the kids yelling in spanish in the background makes for a pretty real experience!javascript:void(0)