How do i get a good bridge

[cloud goblet]

So i've been working on this song and i'm getting to the bridge and i want the bridge to be some kind of foley like a difference, so i wanted to use old pianos, and stuff but i don't really know i just want a pretty dark bridge can someone help me with the idea and how to do it i'll send my song and the two songs i was thinking for the bridge, so yeah

https://youtu.be/3iUgKH8c7p4?list=RD3iUgKH8c7p4&t=88 and https://youtu.be/KlTNKOnfXFk?list=RDKlTNKOnfXFk&t=173

for the first one specifically i wanna know what that kind of like flute thingy is