 So my presentation is going to be very different from Meera because I'll not be going for any code. I'll literally be just talking about war stories, literally peaceful evenings, nothing was supposed to happen. And all of a sudden there is a, so I think that if I had a backdrop behind me, it should have been an explosion. But my puppy was there. So I kept looking back. So let's go with the first one. So this happened. So I have to give a little context in the last decade of my career. I think most of my years have been around consulting and that has helped me to deal with startups, organizations of various skills at different points. I would have clients who would be coming to me for a week long project and some would be much longer. So this was one of the longer projects and I was asked to help them out during the release. So what happened is that there was this very highly anticipated startup and they posted their product on Hacker News and all of a sudden it blew up. So I think that is how normally it happens, right? You put it on Hacker News and all of a sudden everybody remembers you. But you know what happened the next day? The business person comes to the tech team and they are like, we got 500 upwards on Hacker News, but how could we make only 20 sales? Then people asked him that, hey, where were you looking at? They were like, oh, we were just looking at the slave DVD. So as it happens, the replication that they had thought was statement based replication on MySQL and some of you might already be knowing that what might have happened. Basically, while the statement based replication was happening, all of a sudden there was an error due to which the lag kept on increasing and instead of around 200 sales, all the data that the business team got was 20 sales. And the funny thing is that when I started asking them that, hey, didn't the system set up any alarm or something? They're like, oh, do you monitor S12? I was like, I think so. So that's the point that many times these small, small mistakes, we make a small decision but the repercussions of that small decision can literally affect the whole business. The business was flying blind for that many hours because they did not know what was happening. So this is like something which was like even with a small mistake, so much can happen. Then there was another very funny incident that happened. I will not call it a war story, I'll call it a campus story. So a very big MNC approached some big organizations to develop software for recruiting in the campus but then they realized that they don't have the budget. So what do they do? They just ask a college student to build it. So in the intro and looking at their names, I know that a lot of people are from the Ruby community and this gentleman decided to use ROR, the latest version because he wanted to learn something new. And he went for the validations on the model. So now imagine what might have happened. Now all of a sudden the students cannot submit the details because you've put a validation on the model but you did not realize that the validations, a lot of the validations need to be put on the database level because the gentleman did not even realize that there can be race conditions when you use the ORF. So I think the over reliance of ORF was something that the gentleman learned very quickly. I think he learned it before even joining the workforce which is I can say a very good thing but that definitely was something funny because the people were like, we built a software to get students details and nobody could submit their details because of the unique constraints that they have built. The next two war stories are very simple. I think everybody can understand this. There was a table, billions of records, somebody just ran a migration on it. Imagine on a Friday night when your site is supposed to take all the reservations in the world all of a sudden nobody can do anything because you ran the migration. So out for the day, out for the whole future try not to run it on Friday nights but I think a lot of people love to do it on Fridays and have reliability skills. And one of the most classic one was that the ORF team was not told that the tech team is migrating from MySQL to Postgres. And they had all their reports configured for MySQL and it was damn funny for some time after which it got serious but I felt that this is like something which happens and a lot of us kind of underestimate how important communication is. So it's not only about the SQL syntax but it is much more because with this data businesses are built and worked out. I think this is all the war stories I had from my site.