The first lesson I learned from this lecture is how to be an active bystander. More precisely, if we see that something wrong is happening, then we should do something about it. Especially when the victim is a student of the classes for which we are TA, our responsibility to help him or her doubles, whether the incident takes place on-campus or elsewhere. If the situation is an emergency and if we recognized that we should intervene, we should ask the victim if he or she needs help; if yes, then we should listen to them, believe them, and encourage them to call the police and other required actions. In some situations that someone is stalking a victim, we can call others for help and intervene.