About Half-Life 2

It's commonly pointed out by various people (also by the Concerned HL2 comic) that you can't sprint when your flashlight runs out of power and this doesn't make sense (to them). However, they fail to realize a simple fact: default movement mode is already running (this is fairly obvious, which makes me wonder how people manage to miss it). The thing they think is running is literally sprinting largely accomplished by the aid of the HEV suit (a type of utility power armor) Gordon is wearing. So the sprint expends the same suit energy your flashlight uses. However there is obvious discrepancy in the amount of energy used.