There’s an old children’s song that sometimes is used by improv troupes to warm up as a team. They huddle together and repeat:
Whether the weather be cold
Or whether the weather be hot
We’ll be together
No matter the weather
Whether we like it or not!
The alliteration and rhyming helps to get into a state of silliness where it’s acceptable to speak in such a whimsical manner.
That’s what a lot of the art form of improv does: it primes you to be able to play like a child again.
So that come what may, you may come to say, something silly or really stupid, but it’ll be okay.