EXPLANATION

• Bhisma laid in Bed Of Arrows due to his Bad karma in his past lives by Piercing a Butterfly.
• As he pierced the Butterfly In Return he got Pierced by Arrows.
• Bad Karma for Killing a Insect is Less when compared to harming a Human.
• Bhisma was a Bramacharya,Great Warrior,Dharma Follower and would had Good Karmas in Great Level.
  

QUESTION :

• If Bad Karma for Killing a Insect is Very Small then how a Great Dharma person like Bhisma would be Affected by Bed of Arrows ?

• Why Insects Killing are compared to be Less as compared to humans ?