Deformed...

Conkers!

I brought these home from our day out on the loch... I noticed them when I was stripping in the car park worry not I put my clothes on before I went scavenging and put them in my pocket.

Needless to say I've not done anything with them other than watch them go brown. I'll save them for another day when I'm scraping the bottom of the barrel desperate for a blip to cut them open and see what the inside holds.