It reminds me of one of my kindergarten teachers who did nothing but yell at the kids. There were two teachers co-teaching in a large, combined kindergarten class since it was the hippy 70's and they did weird stuff like that. Mind you she didn't wear a Halloween mask and I was older than those kids by 2 or 3 years, but the constant yelling made me very nervous and didn't lead to a very conducive learning environment for me and other students.