"Darling Dog,
I understand that everything is very exciting, and that you're extremely anxious to get from one floor to another as quickly as possible to see what wonderful things are happening. However, I'd be enormously grateful if you could possibly wait until the humans have finished descending the stairs before you launch yourself downwards at full-pelt. It'll save on the cost of ibuprofen and tubigrip in the long run.
Many thanks,
Your bruised and injured Mummy x"