My employer is raising some new buildings on campus. One of them will have a basement, which means digging, which in this case requires explosive excavation.
Here’s a video from a few weeks ago. The explosion occurs around the 25 second mark.
Notice the fuse flashing like a bolt of lightning, diagonally above the middle of the mat. That flash always happens, but doesn’t always show up on video due to the way cameras take a series of still images very quickly. There’s a small pause in between each image, and the flash is lightning fast.