Was doing two deployments at the same time. On the first one, I got to the point where I had to clear the cache. I was typing out the command to remove the temp folder, and looked down at the other deployment instructions I had in front of me, and typed the folder for the prod deployments and hit enter, deleting all of the currently installed code. It was a clustered machine, and the other machine removed it's files within milliseconds. When I realized what I had done, I just jumped up from my desk and said out loud "I'm fired!!" over and over. Once I calmed down, I had to get back on the call and ask everyone to check their apps. Sure enough they were all failing. I told them what I had done, and we immediately went to the clustered machine and files were gone there too. It took about 8 hours for the backup team to restore everything. They kept having to go find tapes to put in the machine, and it took way longer than anyone expected. Once we got the files restored, well we determined that we were all back to the previous day, and everyone's work from that night was all gone, so we had to start the nights deployments over. I got grilled about it, and had to write a script to clear the cache from that point on. No more manually removing files. The other thing that came out of this for the good was no more doing two deployments at the same time. I told them exactly what happened and that when you push people like this, mistakes get made.