What made Bhishma to lay down on bed of arrows ?

  Bhishma was ichcha marani meaning he  can opt to die on the day he  wish.

Likewise when Mahabharata war was happening , Bhishma discarded his all weapons after Shikhandi stood infront of him to fight.

That time , Arjuna had shot many arrows on his back . As he was an ichcha marani , Bhishma didn't die instantly .

Bhishma was waiting for uttarayana to come for his death . As he was bleeding , he just laid down on his back with pierced arrows on the ground .

Those arrows themselves acted like the bed for him . Laying down on the bed of arrows , Bhishma was waiting for his death time to come.

Bhishma was in lots of pain . That time Shri  Krishna came to meet him . That time Bhishma asked for the reason for his agony with Shri Krishna .

That time Shri Krishna said that in his previous birth , Bhishma was a king .  When he was returning from hunting along with his soldiers , he spotted a snake on his path.

Bhishma waited for some time but the snake didn't move . Bhishma ordered his soldiers to pick up the snake and throw it to nearby bush .

But that bush was full of thorns . Snake which was thrown was alive and it met its death by all bleeding over its body as it had fallen on thorns.

As the punishment of his bad work in his previous birth , Bhishma had to suffer the same situation in the present birth. As the result he was laying down on bed of arrows all bleeding .

Karma haunts .....