Even though it isn't a gundam that is stolen, it takes some amazing skills for a 13 year old (the main character) to: Grab hold of the flying mobile suit after landing on it in a parachute, fight hand to hand the ace pilot who is far older and is wearing an helmet, and after a brutal fight managing to take control of the machine underwater. It really needs to be seen to be believed.
In episode 9 nearly all of Uso's friends get themselves a CMOA; after Uso and Shakti are held hostage by Chronicle and his Zolo squad his friends come to his rescue. Odelo, knocks out a trained Zanscare Zolo pilot but gets overtaken by his buddy and he along Uso (who comes to his rescue) are about to be executed. Genki Girl Suzy riding on a lamb with a herd of them distract the pilot long enough for Odelo to get his gun.
Later in that same episode when Chronicle after pulling a Gundamjack on (Uso's Gundam) Chronicle heads back to his Zolo and is shot at by Odelo. Odelo is stopped by Katejina who says he's ruining her spy operation on Zanscare but he (like the rest of the audience) isn't convinced. Back in his mobile suit Chronicle threatens to shoot Odelo but he tells him if he does he'll kill Katejina at the range he's at.
Though it overlaps with a major Tear Jerker, the kamikaze run of the Reinforce Jr. definitely qualifies, from all the defiant looks on the old guys' faces to the music in the background. Probably the most awesome part of it, though, is the long-overdue manning-up of the ship's captain, the fake Jinn Gehenam, who decides to go down with the rest of the bridge crew.