To be OMG! and totally grossed out - nappy.....
I was changing DS in the loo at a playcentre the other day, a mum comes in with her 2-ish yr old DS, takes off trousers, opens nappy and finds its one of those lovely big poo's that our little angels are capable of springing on us. Luckily it wasn't a leaking one - but it was HUGE!
The mum takes one look and says "Eurgh, think we'll leave that one for your dad when you get home", closes the nappy back up, redresses her DS, sprays some Impulse on his bum and goes back out.
They stayed at the centre for another hour before leaving.