Prepare a fully charged Iron Curtain. Then build 5 Demolition Trucks and drive them into an enemy base. Before the enemy can fire on them, engage the Iron Curtain. The Demolition Trucks will only explode when they reach their target.

Play as the Soviets and use Yuri to Mind Control a school bus. If you load 5 Infantry Units onto the bus and drive it into an enemy base, you will not be fired upon.