That’s the built in leaf blower to make sure that the runway is clear for autumn landings. Most airports have their own de-leafing crews, but not all of them.
They were mandated to be installed after a string of landing crashes in the 90s got people making “fall” jokes too often, which upset the FAA.
Looks like Fairmount bagels in Montreal. One of the two bagel institutions here, along with St. Viateur bagels.