Mrs. Hudson tossing *something* (phone? keys?) to John ~ North Gower Street (June 12, 2016)
Look at John standing at attention like a soldier with after catching something* silvery from Mrs. Hudson. His phone is lit up!
* It could be either phone, keys, or neither?
Look at Mrs. Hudson (in a purple blouse, no less - or should I say, lilac?) tossing the thing at John like a lady tossing a favour to a knight going into battle.