Expected reaction, unexpected response

Last night daddy spent some time putting the play pen together. We expected cam to not be a fan of it but the storm we experienced today was beyond our expectations.
At first he was all smiles when put inside as some of his favourite toys were there to join him but after a couple of minutes he realised he was a prisoner. He then screamed and screamed and screamed in the most high pitched, ear piercing way. During his monster temper tantrum he also managed to pull himself up (although by that point he was far too angry and mummy felt bad taking photos). It was an unexpected 'benefit' of the play pen and that alone was worth the money we seem to have wasted on it.
We will try again tomorrow but think it will end up back in the cupboard before long :-(