Left = hmm, not quite, Right = looks interesting, Right = this person too, Left = don't think so... – Whoops, that person was actually quite cool!
Was your thumb too quick? Don't fret, as a Premium member, you can undo an unlimited number of likes.
However, you can only undo the last like, i.e. go back to the last profile you saw.
How to undo a like:
You can always undo your decision using the circular arrow symbol at the top right. With one click, the previous profile will be displayed again and you get a second chance.