This video is of the Mississippi Department of Education building, which in the movie is a high school where people are being held hostage by terrorists. The military has to break through the wall of the high school to get in, and it was my job to set all this up to get the explosion. The director told us to "make it sexy," and that's what we did. We used at least four mortars (really large, heavy-duty bombs), eight party packs (wooden boxes with sand, fake glass, dirt, or cork, and a bomb at the bottom), and several propane poppers to make this explosion look realistic. I along with the rest of the sfx team spent 4 hours setting this up and hand-making every explosive.
Fun Fact: Legally, I was not supposed to be within 100 feet of this explosion when it went off because I could be hurt by the shrapnel, but I had to get the shot on my phone, so I dove into the bushes across the street, hiding from the director and camera operator. The director wanted the shot I had, but the camera operator did not want to get injured, so they ended up shooting from off to the side. I did get hit in the face by some light debris, but I was not hurt by any means. The next day, I showed the director this video, and he absolutely loved it.