that is what I heard...the Ooooh Oh from Lil O.
Here is how the story goes.....
I finished changing baby bums and I put Ri in O's chair(here is a pic of it)
got up to put the diaper in the garbage put the other stuff away then I heard the THUMP then silence then WHaaaaaa and Lil O saying Ooooh oh..... I turned to see what happened and here is O holding his chair straight up and Ri face first on the carpet, guess someone had his first face plant with the help of his big brother.
Ri was ok just got scared so I held and gave him hugs and O wanted to give hugs too and he even signed and said sorry to Ri.