Pig pranks

I went out to feed the pigs lunch, and it was quiet.Suspiciously quiet.They are usually oinking with impatience; they have loudly ticking and highly accurate food clocks. I walked over to shut off the fencer, and I didn't see pigs anywhere.Oh no.I just moved them yesterday, the fence was sound, did they seriously make a jail break? F#$%!I started walking again and Oink! I heard a little grunt.I stared into their enclosure. Wait, is that? What? No way! There's a pig in there?No, there was two pigs in there. They had burrowed under a pile of branches, and were barely, barely discernible in the pile of brush. Totally concealed.Any reason for this gilly-suit behaviour? Unknown.When I started walking away, they came snorting out, shaking off the branches, scampering out oinking joyously. I suspect it was purely a game.  I doubt it was comfortable. I've never seen pigs dig their way under a brush pile.  I think I just got pig-pranked.Let's see if she can find us here. Bet she can't! Hold still!  She doesn't see us! You'd better oink! No, you oink! She's walking away, doesn't see us, hahaha! Oink! She still can't see us and I oinked,  hahaha, she's looking right at us! Haha, oh, we got you good!