Didn't Think You'd Fall For That! (まんまとひっかかるとはな!) is a counterattack used by Raditz.
Raditz crouches down to avoid an enemy attack, then counters them by delivering a powerful elbow strike to the face.
Raditz used this technique when Goku grabbed hold of his tail, but Raditz managed to break free and gain the upper hand by catching his brother off guard and elbowing him in the face.