This is why topics in Coding Help shouldn't be locked.
But on another note, you're totally wrong about this.
Look at the function declaration:
function BoltSpeedCheck(%this, %obj)
It's not a method on an object, it's just a regular function.
You'd be right if it was like this:
function wheeledVehicle::BoltSpeedCheck(%this, %obj)
(Not sure if wheeledVehicle is the right class name, but it's just an example)