If your tortilla tears while you're folding the burrito, don't panic. You can patch small tears with a bit of extra filling, like refried beans or guacamole, which can act like a glue. If the tear is too big to patch, you can try doubling up with a second tortilla. For the future, you can prevent tears by warming up the tortilla slightly before you start – this makes it more flexible and less likely to rip.