Then why is there a "once" and "panda" option for HITs? I'm just curious of the difference in the two.
"Once" catches the HIT once and then tells you and stops looking, "panda" catches as many of the same HIT/batch as it can and doesn't tell you.
You can also change this after getting something in your HIT catcher (this is known as "Pandaing" for reasons other people have explained) with the "once" and "sound" buttons.
So, is there anything to do today, or can I take my time getting up and making breakfast?