What does "Yeah, some life." mean?

[Context] Cal is Ben's son and is living under a false name for reasons.
Ben: Can't have anything happen, which is why you gotta lay low. No leaving the house.
Cal: Wait. What? No one even knows who I am.
Ben: Angelina does.
Cal: Who's she gonna tell? The police? They'll arrest her.
Ben: Cal, It's nonnegotiable. Your life could be in danger.
Cal: Yeah, some life.
Ben: Cal! [Cal goes up stairs.]

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Let’s start here:

“Some ……”

In the past, this statement (that’s some boat! Or that’s some car!) used to mean wow! That’s a really great boat! (Or car) when saying this out loud, you would have said “some” with a lot of emphasis! “That’s suuuuuum car!!”

So you could say:

That’s some life! And it would mean what a great life!

Now… the phrase has really become the opposite. “Some life” means I don’t really have much of a life.”

Example:

A teenager finds out she didn’t get into her favorite university and is very upset. Her mom says: you still have many great choices. Just think about your future.

She responds “yeah, some future.”

She thinks her future looks bleak.