Harrison Smith was ejected from the first half of the Minnesota Vikings - Houston Texans game during week 4. Smith was called for targeting after he hit Jordan Atkins helmet-to-helmet. Vikings coach Mike Zimmer did not agree with the call and let the officials know it. And he did it in a way that won't get him a big fine from the NFL.
Look, if Andy Reid is doing something - like wearing a face shield or using Patrick Mahomes as quarterback - every coach should try and copy him. Zimmer did just that and was able to loudly express himself to officials in a matter that was both safe and effective.