My best match was on Under, as Nod.
GDI were pushing our base hard. We had a hard time repairing the damage to the Obelisk and the Airstrip. 14yo me decided to spawn as engi and try to get in close and deal some damage with C4. As I was planting remotes, the guy driving a Mammy jumped out to repair it. Without thinking I immediately jumped into the Mammy and drove deeper into my base. With the support of other engis, we countered the attack with one Mammy and basic infantry.
After my successful capture of an enemy unit, others followed me into the "battle", hoping to get us some extra armor (as we lost the Airstrip earlier). We've managed to steal one extra Mammy (that was me, again) and a Med tank.
Eventually we won the round, using GDI's vehicles against them.