MacGyver weaves a fire hose through the rungs of a ladder with the nozzle at the last rung. When he heaves the ladder up to an angle on a box, is shot at, and dives for cover, it is clearly seen that the nozzle end of the hose has fallen out of the rungs and it and a couple of feet of hose is hanging down at the ground. However, when Hines turns on the water, the hose and nozzle are back through the rungs at the end.
Though implied this is in Los Angeles, the Vancouver (Canada) Lookout is visible in at least one scene.