Below: just frames before all heck breaks loose.
Fire In The Hole!: Blowing Up A Transparent Engine By Feeding It Gunpowder

This is a video of Youtuber Warped Perception adding some gunpowder to the fuel mix of a transparent-topped engine. The results *putting on cool guy shades* are certainly explosive. “Those are way too small for your head.” Yeah I think my nephew and I might have had a mix up.

Keep going for the video, but skip to after 3:00 for the explosion.