at least, make it look like you can solve it incredibly fast
a small preview of what it looks:
Step 1: Learn to solve the cube
you can either: learn to solve the cube the normal way, I'd recommend the instructional vid by Pogobat
or you can use an online application to do it, like this one
Step 2: Notation
I'll go over it again just to be sure
-The front face is labeled F.
-The back face is labeled B.
-The top face is labeled U.
-The bottom face is labeled D.
-The left face is labeled L.
-The right face is labeled R.
-If a letter is labeled by itself, turn the face clockwise as if you were facing it.
-If a letter is labeled with an ', then turn the face counterclockwise as if you were facing it.
-If a letter is labeled with a 2, turn the face 180 degrees(twice).
Image borrowed from eLeet until I've shooped my own, check his instructable for solving the cube while you're at it
Step 3: Scramble and solve
the code: D L2 B2 L2 R2 F2 R2 U2 R2 D' U' R' B F L' D R2
the solve is shorter, you can learn it by heart and to make others believe it's an actual solve you have to: R2 D' L' F' B' R' U'
the solve has to be done with the pattern in the image facing you
good luck on learning it and showing everyone
They'll think you're a genius