I like to thanks to who I can't list all the name out, but really appreciate that the lovely replies and comments.
Actually my first intention not to focus on the expression, but that day really too crowded and many photographers who stood very near the subjects to shoot, so I choosed to shoot from far with tally lens, that's why can get more clean background, but not so easy also, a lot of trial and error to capture the right moment.
By the way, I should said all the thaipusam photos in clubsnap did inspired me a lot, before I went for the shooting, I keep browsing the past year photos, that's how I learn from clubsnap.