I'm not into killing things, especially spiders and bugs, but sometimes you have too.
The chances are, if it has travelled quite a way in a truck, from it's normal habitat, to get to your camp, it could have died anyway. From what I know about it's European and Asian cousins, funnel webs are quite susceptible to temperature or humidity changes. The Euro version digs quite a deep tunnel so it can control the temps it is hiding in by moving up or down depending on the outside temperatures. They are OK with the cold but die quite quickly when exposed to the summer sun.
Personally I would have kept it. They are fascinating little things and quite interesting. Though unless you are confident with arachnids, it's probably best to keep away.
For future reference, they breathe with book lungs. This type of lung is very limiting, i.e. they can only move for short distances before they need to stop and take another breath. A full out charge would be quite short and staggered. Also they should not be able to climb smooth surfaces, so you should be ok with glass boots
Funnels webs are quite moody though and sometimes stridulate as a warning they are not happy or just don't like your face.