Instantly jamms the browser windows.
Just click the Run on repl button and fork the repl. Then copy the run link and share it to friends(at your own risk) and crash their browser.
Go to taskbar and right click. Then select Task Manager. Then select the browser program running and Click End Program button.
I won't be the reason for your/friend's to break or crash. I just made the program, it depends upon the user.