Should you get a broody and be pulling her out of her box you should be careful to do what I call "picking her pockets" before lifting her. That is, you reach up under her wings to take away any eggs she's got up there -- otherwise you can crush and egg when you pick her up an that's nasty for...
I've had hens move the golf balls from nest to nest or from the nest into a self-made nest in the floor bedding.
A hen can carry an egg tucked under her wing.
Watch for someone going broody.