Praise. Almost ridiculous; almost unbelieveable. Almost in the sense of 'approaching but not arriving; nearly, but not quite'. I almost won (I didn't win). I almost lost (I won). I almost succeeded (I failed). I almost failed (I succeeded).
You should understand that this use of word "ridiculous" is informal. Americans wouldn't use this word in a professional or formal setting. You also have to be careful since the word "ridiculous" can also be used to mean "absurdly stupid".