"I will transform in front of your eyes!"

"And to prove it, I will transform in front of your eyes!" spoke Walter.
"What!? Sure, Mr S!" chortled Jürgen, but by then Walter had already pointed the device at himself and pressed a button! And fizz!
Suddenly there was a bright flash, then a pink cloud formed around Walter, which then totally blocked the boys' vision and also took their breath away.
"Ugh, oh God! Peter, do you smell that?".
"Wow, it smells like fish!" came from Peter.

Finally the smoke had cleared. Both young men opened their eyes wide as they saw...