Anup sir, the gate shown in above picture is too tight, when closed. When you lift the lever /latch to open the gate, it suddenly throws up with force. Hence, if you open the gate with loose hands then the hands may get injured by may be pressing in between lever and gate.
The caretaker insisted us to open the door with care as few people got injured while opening the gate. I remember it because shouted from far distance first to stop us and then told us about it. Most of the people who stop there for a cup of tea tends to get excited to see the river aside and starts running towards it.