From David Penn, the creator of Coinvexed 2. Wizard FX Productions proudly presents BIONIK.
An examined dinner knife is signed by the spectator along the handle. They hold onto the handle and can clearly see that the knife is straight. All you do is massage the blade softly causing it to bend at a 45 degree angle. The bent knife never leaves the spectators hand and can be immediately examined. This leaves the spectator with an impossible object that they cannot bend back!
BioniK can also be used to bend the extreme handles of forks or spoons to further enhance your metal bending routines.
The same straight knife that is signed is the one that bends. No switches! NOTHING concealed in your hands to achieve the bend at anytime.