Next, always remember that it is important to just keep the words flowing. It does not matter if you get stuck stumbling over your own words; just keep going. You cannot get yourself flustered because freestyling is on-the-spot rapping, meaning that you are going to make mistakes doing it. You have to understand that there will come a time where your lyrics do not quite work or even where you may accidentally diss yourself while rapping.
You could even reuse the mistake later in your freestyle, owning that mistake. You should even create some go-to fillers that you may use if you find yourself stuck in your words.