I did this after section 5.  I removed all the power lines from my neighborhood.  I mostly used the Spot Healing Brush but the Patch tool and the Clone Stamp Tool as well.  Wish it was that easy in real life!

Removed the lift.  Again, I couldn't figure out how to smooth out the area under the chairs using the mask.  Will try again.Removed the smoothie cup and the coffee cup from the foreground.  I couldn't figure out how to smooth out the color of the cabinets using the mask tool as in the class.  Will try again.