Short-sighted kid (Doctor Who?)
From Tardis Wiki, the free Doctor Who reference
A short-sighted kid foiled the Sontaran Empire's invasion of Earth even after they had taken over the world government by believing the Sontarans to be his piggy bank. He incapacitated one Sontaran this way by inserting ten pence into his probic vent. (NOTVALID: Doctor Who? 84)