Remember that time Gandalf stood valiantly against the Balrog at the Bridge of Khazad-dûm? This is nothing like that.
Have you ever wondered what it would be like if anyone other than Sir Ian McKellen played the part of Gandalf? Well, wonder no more, friend, because we've discovered the answer in an unexpected place -- New York's Central Park. Improv Everywhere is continuing its Movies in Real Life series by having an actor stand on Bow Bridge in a robe and beard and declare to anyone walking on it, "You shall not pass!"
I have seen Gandalf the Grey, sir, and you are no Gandalf the Grey.
Now if Sir Ian were there, I'm pretty confident some people would definitely not have passed.