'track' 'a twig has been broken'
-and as it goes up...
'track' 'a twig has been recently broken underfoot, something passed by here'
and 'a twig has been recently broken and you can see the faint imprint of steps headed west'
As for doing it in a city, which would be pointless...
'track' 'you see a fresh set of foot prints... your own'
Alright, now it's you guys turn. Let's see what you think and maybe staff will look into it.

