Ran until his legs were screaming in pain as well . Ran until even that pain burnt away and he knew he should be on the ground asphyxiating , gasping and wheezing and choking for air - except he was n't . He could run for - god - damned - EVER now .
According to the above context, choose the best option to answer the following question.
Question: What may be the reason for him running so furiously ?
Options:
- Adrenaline is coursing through them .
 - They need to make it back home .
 - Someone is chasing them .
 - They need to run in order to survive .


Adrenaline is coursing through them .