Originally Posted by DisturbedDan
Do you get another chance for the claptrap high five?
You have 3-4 chances during the story. First is right when you get to Sanctuary, second is part of a quest I believe, third is during
and the last is right before the final quest. If you miss any of those then you can do it after you've completed all the quests and go back to him. So it should be an unlimited amount of tries and unmissable.