Do not sign up your children at this academy. Mister Seo kicked my 6 year old son in the chest, which knocked him to the ground and impacted his head on the mat, causing him to go unconscious. Luckily, he came back within 20 seconds. I took him to the hospital and there was no major harm done physically, but my son has suffered psychological trauma that will likely continue into the future. Mr. Seo used excessive force on my son when he should not have been using any kind of force on the students - instead the children should be sparring with one another. I believe he did this because both of my sons were misbehaving and running around during the session. Not once did I receive an apology about what he did, and I immediately took my son and other son out of the classes. While I have to care for my own children first, I am writing this review to warn other parents about this instructor and academy.