Final answer:
The men are looking down upon the lifeboat with horror because they witness Pi performing a miraculous feat.
Step-by-step explanation:
The men that threw Pi into the lifeboat are now looking down upon it with horror because they witness Pi performing a miraculous feat that shocks and surprises them.
In the novel 'Life of Pi' by Yann Martel, Pi, who is stranded in a lifeboat with a Bengal tiger, demonstrates his ability to control and tame the savage animal. This unexpected and extraordinary act astounds the men who had initially treated Pi with cruelty and now see him in a new light.