I remember that post.
Almost laughed my coffee out my nose.
https://en.wikipedia.org/wiki/Battle_of_al-Hasakah_%28June%E2%80%93August_2015%29#The_battle
This video was the battle of al-Hasakah this could have been (I do not know) one of the WMD. The Kurdish fighters are the ones that reported the WMD's (I'm not sure I think these guys are Syrian forces)
Notice how the bomb went off it didn't spread out and it didn't hit its mark. If it was one of the WMD's it wasn't very effective)
Hasakah Still in Danger of Being Stormed Again by IS