Dr Robotnik, also known as Dr Eggman, has been Sonic the Hedgehog's main villain since the Sega games began in 1991, always trying to slow down or capture the blue hedgehog. Lines where he confronts Sonic directly became popular as short reaction sounds online because the rivalry is so familiar, even to people who have never played the games. This particular catchphrase style fits chase memes and gaming edits, which is why it keeps being reused for moments when someone is stopped just as they think they have escaped.
About this sound
Dr Robotnik shouts Not so fast Sonic in this short cartoon villain voice clip, used for funny catch moments, chases and sudden stops in edits.
This is a short villain voice line where Dr Robotnik catches Sonic in the act and firmly tells him not so fast. The delivery is bossy, theatrical and instantly recognisable to Sonic fans, with the energy of a cartoon chase being stopped mid sprint. At under two seconds it lands like a punchline, freezing the action for a beat before anything else happens. Creators use that abrupt stop to make a fast character, pet or friend look caught out, turning a normal run or escape into a funny confrontation.