tsundere

not accidentally. Accidentally means something tragic happens you weren't intending. With opening cases I presume the main reason is to get high-value skins such as knives and other things. Closing the UI after opening a case doesn't make it an accident. An accident would be you clicking the open case button but clicking too hard on your mouse causes your table to break and you falling over, slamming your head into your monitor thus destroying the screen of your monitor. In the very same second a close family member notifies you that he/she immediatly needs help and is in a critical life-death situation. However with your phone having no power and your screen being destroyed you are unable to read the message, causing said family member to die. That would be an accident.