How do you feel about sudden First Person writing?

In my fic, all of it so far has been in third person, but with this newest chapter I'm writing, the character is inside their own dreams and mind and I felt I might be better able to convey what they're feeling in first person. How he's reacting and processing the stuff around him instead of describing how he reacts to it, if that makes sense.

Only this chapter is wholly in first person but I have frequently had short snippets of first person before, just small thoughts like 'What happened to me…?' 'I can’t do this…! Just make it stop!' Or short blurbs of what the character was thinking and feeling.

I'm just curious how a reader might feel about this sudden shift in perspective, I know going from third to first person can be pretty jarring so I'm hoping I can do it correctly lol