Heavy Backpack Caused Delay

My Tatonka backpack was heavier than I expected. Just didn't know why I packed so many things till the backpack filled up. It weighed about 11 kg when I weighed it at Changi Airport. The heavy backpack delayed me for a while before leaving home, as I figured out how to reduce some weigh. Finally I decided to leave home my tripod. Due to this delay, I reached Changi airport only at about 2.30 pm instead of 2.00 pm initially planned.