Using a sharp knife, slice each egg in half lengthwise.
Gently remove the yolks and place them in a medium bowl. Arrange the egg white halves on a serving plate.
Mash the egg yolks well with a fork. Add the guacamole and the mayonnaise and keep mashing and mixing until smooth.
Spoon the mixture into the egg white halves. Garnish with red pepper flakes and serve. Or chill for a few hours before serving.
Video
Notes
If you'd like to get all fancy, rather than spooning the yolk-avocado mixture into the empty egg whites, you can add the mixture to a piping bag and pipe it into the egg whites.I sometimes do it, but I feel that you end up wasting some of the mixture (it clings to the piping bag), so I usually don't bother.