I'm The New Long Jump Record Holder Apparently

During one of our lunchtimes chats, we had the discussion about if you was on a train and jumped up, would you actually land in the same place and after much backwards and forwards we decided in the view of passengers on the train, as you are travelling at the same speed of the train you are on, yes you would but to anyone outside of the train, no you would land a few metres further forward.
Someone actually came up with the maths which i tried to ignore as not to get a headache but the jist is that if the train is travelling at 100 mph (approximately 44 metres per second), and you are in the air for 1 second, you would land 44 metres further along the track than when you started.
Yep, bit of a headache to work out and i took his word for it because he is a bit of a brainiac but then we got BIG, planet sized actually because the Earth is careening through space at 67,000 mph or 29,900 metres per second so for that 1 second jump, when we land we have travelled 29,900 metres or 18.5 miles through Space.
That's three quarters of a Marathon in 1 second which is not only mind boggling but makes a mockery of the long jump World record which stands at a piffling 8.95 metres and i just beat while standing in kitchen and didn't end with me shaking sand out of my shoes.