First time in my life I took picture of fireworks technically correct. It was quite nervous at the beginning since I have never used the 'bulb' mode at all before (I only knew bulb based on its technical term).
I took my position in front of Parc Hotel 2.5 hours before the firework show began. Parc Hotel is facing the lake where the firework took place, only it's on the higher elevation. 1 hour before the show began, around 9.30, place that was empty when I arrived suddenly filled with people, which made it more difficult for me to move around and to make sure people who sat nearby won't touch my tripod.
Anyway...by midnight, I got home with this picture :) my work is paid off.