Keeping track of how long a torch is burning might be a fun way to mess with players but it is one of those things that would be obvious to the characters and hence shouldn't be used as a 'gotcha' on players.
The last panel here looks awesome
many markers died to make that panel I am glad their sacrifice wasn't in vane.
Really like this page. The Warren Ellis-esque understatement in the dialogue really makes that last panel sing.