I thanks God nothing was lost. I had insomnia the night after that incident but fortunately I had good sleep last night. Just want to remind everyone to be EXTRA careful. Even though you are holding your bag tightly, even though you are with friends, even though you are in somewhere with people around, unexpected things will still happen. BE CAREFUL! Just look around no matter where and when, and be alert with the surrounding.
Thanks for friends who send me regard after knowing this incident. =)