Stargate SG1 s4e9 Scorched Earth
They try to blow up this advanced alien ship (that's terraforming a fucking planet) with a naquada bomb that only has such a pitiful explosion. They even plant the bomb on the ground where the explosion couldn't even reach the ship. Sad!
Jack's plan wouldn't have helped the Enkarans at all and they all would have been wiped out if not for Daniels incredible negotiation skills.