Griffin dies from the gunshot wounds in the hospital. During this the effects of the monocane begin to wear off and Griffin returns to sanity, apologizing for his crimes by saying "I meddled in things that man must leave alone." The invisibility also wears off in death, and Griffin's body becomes visible again.
I’m not for sure if this will help, but I hope it will!
Answer: Because most of his family, and most of the people he cared about all died.
Explanation:
A) Nail
You use thread with a needle and a nail with a hammer