This takes place in the 7th Episode of season one. Everyone was on the roof, almost out of gas.

Connie, Jean, Krista, Ymir, Sasha, Armin, Marco, Bertholdt, Annie, Reiner and Mikasa were stuck.

"I'm strong, extremely strong." Mikasa said as she drew her blade.

Almost everyone died, Eren was eaten, who knows what happened to them.