"Winter" is called. This means handler cuts upfield (because it's wintertime up in the North, duh). If we're near the endzone and have called "Endzone, Winter!", then set up normal endzone stack.
1 must cut breakside immediately to draw off defender from open side space. Dump cuts upline for the score. If disc is on sideline, "Winter" means center handler cuts upline.
Again, "Winter" can be called from anywhere on the field, not necessarily endzone. It just means handler is going upline immediately.