The E.G.G. Truck and Metal Sonic are the dual bosses of World 7-5: City Escape. Both bosses battle against the player at the same time, taking turns launching various attacks against them. The truck itself is heavily armored, and is completely impervious to all manner of damage, save one. Metal Sonic is invincible to all manner of ranged projectiles, and quickly defends himself against melee attacks with an electrical barrier. Each foe has a variety of attacks they can choose from to use against the player- the Truck mostly uses heavy artillery such as missiles and bombs, while Metal Sonic uses a variety of electrical attacks. To make things even more difficult, this battle takes place on the freeway at high speed, meaning the player must run forward constantly to avoid being hit by the tr