Guild Wars 2

Ok now it make sense, thanks for clearing things up!

I didn’t find any info about this, but it looks like a hidden room and item possibly? I know it’s not affecting achievements like it doesn’t count for bachelor of secrets or master of enchantments.
So question is, how to open these door, and what does fist with arrow down mean?

I’m achievement addict, and I can’t get this stupid achi… The idea that it will be little gap in Secrets of Southsun is killing me :x I farm crab toss as much as I can, since I work full time job it’s not alot of farming. Still tried waking up at night during weekends and trying get this nonsense, found alot matches with only 2 or 3 peoplel, and everytime one of them is ignoring chat and just running for crab even if he/she is far away from being champion score wise, or hell one of them intentionally staying away from crab and or karka, and dodges it so that you could ragequit more easily…
Thanks ANet for making us (achievement addicts) go crazy..
Also I’m sorry for my grammar and incorrect sentences. English is not my native language.