Spoiler Alert: This story includes details about Episode 815 ofABCs9-1-1, Lab Rats.

I was laughing at myself saying, I dont know what is happening!

I know this isnt real!

Kenneth Choi in ‘9-1-1’

Kenneth Choi in ‘9-1-1’ABC

Why am I acting like this?

But it was devastating to me.

Then I just kind of went into those stages of grief, he recalled.

9-1-1

Denial, mostly: This doesnt make any sense.

Why would you do that?

And I continued to fight him on it.

Maybe theyll change their minds.

Maybe theyll reverse course.

But that did not happen.

I dont think Peter imagined this ending right now.

But it also followed his storyline: Hes captain of a very close-knit firefighter family.

Teasing whats coming up ahead, Choi added: The 118 is now fractured.

Youre cutting the head off the snake, and the rest of us dont know what to do.

Basically, every moment it will still be with us, and the loss will be with us.

Chois words come amidcast tributes to Krause, including fromco-star Aisha Hinds.

9-1-1returns May 1 on ABC.