The DC-10 was my first airliner as an F/E up till then it was 40 seat commuter planes and smaller. I had exactly the same thought, that was a big airplane !
Nothing wrong with that sentiment.
No not at all, it has gone through all our minds I am sure. Suppose it was funny to hear him blurt it out when we were strapping into the beast every day.
Never flown an aircraft outside a sim but the first aircraft I taxied was a 742F, empty. I remember it overwhelming me a bit just how large a machine I was operating.