We have organized many mentored sprints, but being in lockdown meant we had to run our first online mentored sprints. Moving such events from in-person to an online setting was a challenging yet quite enlightening experience. To start with, there are many things that work in traditional sprints but does not work in an online format. Learnt from our experience, so that you do not have to start from scratch. In this talk, we are going to tell you what challenges you will face organizing an online event, and how to overcome them, from making the right technical choices to supporting sprinters and open-source mentors.