I'm no card man (hate the things, actually) but I've stood there with Michael on numerous occasions over the years, as he's done the Card on Ceiling... including a 3 story toss & stick during the Queen Mary Convention long, long ago.
I can assure you that Michael has researched the living daylights out of this bit can sells only the "best" method that he's found to work in well over 30 years of working on it.
Though they are now gone, there were a few magic clubs in the 70s and early 80s known for all the signed playing cards lining their ceilings as the result of this one effect and the fact that every magician in the house did it; it was super popular in the day and it would seem, making a come back in our present.
