You could like, then unlike, then like, repeat as long as you want. Not the same but it's something.We are continuing to look into the forum software's lack of a double-like button. Until that's implemented, I'm going to post this reply and then like my own post.
Edit to add: Additional defect noted, I can't like my own post. Consider this a double-like of your awesome picture at the end of a most excellent adventure.