Invisidisability

[PhineasQP]

Sam had finally found the secret of invisibility.  Once he administered the serum he would be completely transparent.  He couldn't be sure how long the effect would last—several of the mice were still unseen three weeks later— but he simply couldn't wait.

He'd dreamed of becoming an undetectable spy.  Of being a superhero.  Of…well…women's locker rooms.

He excitedly emptied the syringe into his arm and became utterly invisible.

Light now passes right through Sam. Through all of Sam, including his eyes. Poor idiot's been completely blind for two years, waiting for the lousy serum to wear off.

[strawman]

---> Sam does not wait, because he no longer exists.