I bet you got some strange looks, as you should put it on the inside not the outside. Also, get a thick reflective film that has a sticky side, not attach it with duct tape! LOL! I installed this in my bedroom windows like 10 years ago to totally block light (for better sleep) and lower the temp from the morning sun (also better sleep).
Best part is you totally can't tell from the street. It looks like any other window. Also, it just peals off the glass with zero mess.
But anyway, thanks for the bushfix laugh.