I completely agree with all of the above, but I think it is possible, however rare, to come across a situation where a light jog is appropriate.
I agree completely - but here, I think again the distinction to be made is that you are essentially using your feet as a primary response mode. Yea, sure, you had to drive to the ambulance access, but if you have to go a half-mile after that... well, that changes things, doesn't it?