One Piece.S15E619.Running Wild! Invincible General Franky!

The laboratory crumbling around them, and time running out, Luffy, the Straw Hats, the G-5, the children and all the others make a final desperate sprint towards the one exit left off the island - but Joker has one more trick up his sleeve, and a deadly secret kept deep in the island spells doom for everyone!