Walter turns into... well, whom?

"Sure, let me show you!" Walter said and slowly started to undress.

"Walter, what are you doing?" the principal asked.

"I am getting ready to transform!" Walter said as he was standing in front of the principal topless.

"Well, this better be good..." the principal mumbled while Walter continued.

Finally, Walter stood in front of him. Buff naked.

"And now, watch me for the changes! Here goes nothing!" Walter said as he activated the device.