The preview of Fortress’ Recharge pictures him starting the skill while under enemy fire. Then the camera pans to a group of 3 soldiers, and goes back to him recharging. After that, it ends when the lighting hits the soldiers.
I was reading the skills on english, and I saw that, on my brother’s account (he hasn’t unlocked Fortress yet), his Fortress ALWAYS dies during Recharge preview. It’s hilarious. Even more when the camera pans to the soldiers, and comes back to a dead Fortress.