I remember once live debugging a web app in production. We asked the user to go try to reproduce the bug and when it hits it, the debugger opened on the excepti

I remember once live debugging a web app in production. We asked the user to go try to reproduce the bug and when it hits it, the debugger opened on the exception, we took a look at the stack, found a small issue, fixed it and made the debugger to continue. The page rendered without even terminating the thread that had received that http request. All the user felt was a delay until I've pressed 'continue' on that fixed method in the debuggeer. The stack was Pharo Smalltalk using Seaside remotely connected using VNC