Up by Mt. Clemenceau in the Canadian Rockies, a pine martin kept trying to climb the metal siding of the Grassi hut but kept falling off . All night we were listening to skritch, skritch, skritch, skrrriiiiiiiiitch, thunk.....skritch, skritch..... It made off with a friend's used stinking climbing socks and tore them to pieces. Much appreciated, but the alpine starts were rough when you could hardly get to sleep.