Character Design: Chase Scene - Abandoned Mine

I created a short chase sequence in class; 

An adventurer rappels into a mine shaft looking for treasures and stumbles across bioluminescent crystals. Picking them inadvertently creates sparks due to their flammable properties and ignites a trail of gunpowder leading to a minecart; the adventurers' headlamp illuminates its contents upon which he discoverers it has begun to roll towards him, it is filled to the brim with dynamite. His only escape lays down the tunnel at a crossroads, he sprints for it and narrowly escapes around the corner before the cart hurtles along the track past him. A few moments pass on the adventurer before realization dawns on him and he sees the cart coming back towards him from another tunnel, the dynamite fuses are sizzling away inside. Behind him he can see the light of day through a grate in the far end of the tunnel, a desperate sprint towards it reveals the track has collapsed in his path, he leaps the gap with the cart trailing behind him at a distance. Its passage is slowed by layby tracks in the tunnel. He gets to the grate and realizes its locked by a heavy, rusty padlock. He realizes his escape is futile. He turns to look back at the minecart explodes next to him. End