i mean, i read the reports of this high—profile moment where you invited the press to see this amazing monster truck that was now running on hydrogen. as i understand it, it could only run for 20 minutes on hydrogen. yeah, it's called proof of concept. i mean, did you think about the first flight? it's not like these. i mean, that's proof of concept — it worked. it's no use to you. 20 minutes of truck operation is of no use to you. it might take you many, many more years. judging about the future of the battery in electric cars... the fuel tank, stephen, was about this size, not that much bigger. so now we're putting in a really big fuel tank. we think it can run about 2k hours, and really i'm ecstatic with that. i mean, it's away from the plant, it can refuel in minutes. so if we can get it to 2a hours, i'm shifting those trucks up to site. but, stephen, let's not focus... hang on, i'm trying to get inside your business brain, and you've just used the word "if". you're telling me you're utterly committed to this, but i'm asking you if you fail, and it's very possible you will, in 2030 that you're not a net zero emitter, what will you do?