I got excited by this article, which told me that invisibility cloaks might could actually come to be!
Though I still treasure the moment when Colleen and I ditched a seminary class one Halloween to go to JoAnn's Fabrics to buy shiny silver material so I could sew my effective-only-with-a-good-imagination invisibility cloak for Joel's birthday. The woman cutting the fabric asked, so pleasantly, "What are you making?"
"An invisibility cloak," I answered, enthusiastically.
She was suddenly silent.
"Like from Harry Potter," I added.
After another moment of silence, she simply noted. "I still don't get it."