I can vouch for #47, the chipmunk hamming it up. A local radio station interviewed the couple and they talked about how it happened. They had set the camera up for a self portrait and just before the timer ran out the chipmunk investigated the camera which focused and fired. If memory serves me it happened in the Banff National Park area-ish.....but they are enjoyable to look through. Let's say I am skeptical of most of them.
I have a number of these "blooms" from the Blue Angels here at Seafair. None nearly as cool as this one, though.The jet and conical "clouds" is for real. Given the right humidity and temperature conditions, this can be replicated easily just as the plane is breaking the sound barrier. Pilots know when it's happening and can adjust the throttle to keep these sonic cones relatively stable -- enough for several frames at a time.
but a lot of the other ones do look suspicious.