MC: You all have been performing at so many showcases and it must be very hard. The fans wish that you would take care of yourselves esp. your health. Please be healthy. Can you make a promise with the fans here?
Jaejoong raises his little finger Jaejoong then does the little finger - big thumb motion with Yoochun, and then Junsu.
JJ: We promise. Can you all (directed at the fans) also promise to take care of yourselves and be healthy?
Everyone in the hall raises their little fingers as if to make that promise.
The fan accounts all say that the venue has been very noisy until this moment when all the fans fell silent without any prompting. I'm sure this must have been a very touching moment for everyone there. *sniff sniff*
Source:
http://staygoldvicky.livejournal.com/190153.html