This happened few years ago. That was a really strange experience for us and a unresolved mystery.
Me and my friend, we use to go for a an evening walk almost everyday and went home only after the sun set. So, as usual, we were retuning home after the sun had set in.
Before, that let me tell you something important related to this. There is a street lamp and a small guard-house before entering the colony where we live. It is a single road that leads to our houses with one difurcation to the other road.
So, as I was saying we were walking down the road chatting happily. When, we came right below that street lamp. It started flickering and only stooped when we were few steps ahead.
This happened twice so we decided to keep an eye while crossing the street lamp. We were really surprised that a person walked below it and it never flicked once. But when we passed, it started to flicker and stopped when we were few steps ahead. It went on like this for a week and never flickered again.
That was really strange.