Such wonderful disappointment

[mekender]

Not all that sure it was ISIS... The last guy in the video was wearing a jacket that looked a lot like a uniform, my thinking is Iraqi police or something.

The distance is tricky to determine, the shot looks like the camera never moves much from the original spot, maybe a few paces.

I agree about the explosion, it looks like the blast comes out of the barrel first which if it was a strike, that would be an exact hit on the breech. Not an easy hit for any weapon.

[Aesop]

I'm calling BS.
a) the piece wasn't in active use.
b) everyone was standing around waiting for the impact.
c) a hit on a functioning piece would have entailed a crew of 6-8 guys (even assuming they weren't following the Ft. Sill-approved manning table) to service the gun, and all in close proximity. This one had zero.

This was possibly many things, but a USAF hit on a firing arty piece isn't one of them.
Show me a vid with 5-10 hadjis flying through the air after the blast with surprised looks on their faces, along with immediate secondaries from ready rounds and powder cans in proximity to the piece, and we've got a winner.

[Cobar]

Could it have been Iraqi forces blowing up a captured gun and someone added the GBU to the clip?

[Darrell]

*My favorite one was footage of a test with 2 weapons dropped on a truck. First one hit the front wheel well. At first they thought the second one misfused and detonated early in an airburst, until the high speed footage showed the engine block, blown out of the truck in a ballistic arc, and intersecting the second weapon in the air at just the right angle to initiate the fuse.

There is a youtube vid, Best of JDAMs or something of the sort, that shows much the same happening in theater.

As for the vid, looks fake as hell. The bomb dropping in, that is.

[mekender]

Could it have been Iraqi forces blowing up a captured gun and someone added the GBU to the clip?

That is my guess, or it was an old gun that they were abandoning in place/destroying.

[JAG2955]

One of the contractors that did some training with us prior to deployment told us that his Afghanis would fire a mortar by all running away after setup except the bootest of them all, whose job was to drop the round, then run like hell. No one to sight it in, spot the fall of the round, fire a salvo, or make adjustments.

I would not be surprised if this was the same. I'm going with a round in the tube went off, either due to breech failure or a spiked Eldest Son-esque round.