You don't. Especially when the mother is around. All hell will break loose and you will end up the nearest tree. Mother love is powerful :).
I live in the land of the Moose. It is highly unlikely that you would make it to the tree and even less likely that you could climb the tree even if you could run that fast.
I have a beaut image sent to me by a friend called a moose kiss and only in Canada. I don't know how to show it here. So if you wish to have a copy sent to your email address, send me a request firstname.lastname@example.org And I would like to send it to fishlet :).