Hello,
The contect is...
If I hand you a baby to hold, what happens to you? Your voice changes, your face changes, and your vocab changes right before my eyes in a way that's almost
too weird to witness.
Your face turns to rubber and you start cooing and talking in a tiny voice. Have you ever changed!

what does "
your face turns to rubber" mean? surprised? astronishing? or soft?

can "too weird to witness" mean "never seen before"?
Thank you!