I did this just recently. Before I went to a middle east country for an SEO job, I am a PHP dev for 7 yrs and my last work made me realize that I'm not growing or something and this new environment would make me do this change. Unfortunately, after working for only a few months, I was sent home due to health reasons and dev jobs are hunting me again which I think because of my qualifications in the past.
I accidentally deleted all data from live database, thought it was our beta database server. Good thing it is synchronized on our beta servers so was able to bring it back in no time. The moment I clicked that delete button I was like face palming myself all over. I learned from thereon to double check every time especially when working on between production and test servers.
