He was walking to get gas. Because he was out of it.
Hey! He got lucky!
He can just grab a dinosaur and make it pee in his can before it gets into the dirt and sinks down to where it has to be drilled for!
I think this is supposed to be interpreted as '“lol gas = dino juice so a time traveler can get free gas” but I initially read it as “Finally I have located the birthplace of the first sentient hominid. It is time to undo the destruction of mankind before it even begins. For a touch of irony, I will immolate them with the very poison with which they would have devastated the Earth.”
I saw it as neither. I thought his gas-powered time machine had run out of fuel, so he’s walking to the nearest gas station (the joke being that there won’t be a gas station in this era, so he’s trapped).
honestly that sounds most likely to be what Larson intended lol
I interpreted it as the time traveler using the Time Machine to fuel his car / machine because it’s gone in the future.
I know what’s wrong with it.