WARNING: PICTURES AND LINKS WITH PICTURES
Never saw anything like this in my yard before.
Dug it up in my garden, was weeding, apparently came up with some weed or other, saw this thing that looked like a nut in a shell, kinda like a peach seed in a peach pit.
Then the seed leapt out at me, or well crawled out aggressively.
http://en.wikipedia.org/wiki/Trapdoor_spider has info.
Musta pulled up the whole "trap", not sure where the lid went.
Here's the "little" fellow:
For Size, I picked up a rock
And rolled it near him, I think he found it threatening.