Can anyone identify this seed?

[oggy]

I found this on the ground at work, it's so large that I decided to take it with me and see what can come of it. It sounds hollow and there is a slight rattle inside. It may be a bad seed, but I am still interested in what would have come from it.


[edit] added a picture with a quarter for sizing.

[tomc]

if it rattles, break it open and plant the seed inside.

Nothing ventured, nothing gained.

[shadylane]

I could give you a few to go by. Just to indulge the curiosity.
Fring tree/bush
Pignut
Butternut