[greymule]

In OBR, the BR on a BOB may over-run first and return immediately without liability. He/She must make an attempt to advance to second in order to be putout. The BR can turn left, right, or run straight through the bag, it makes no difference, provided they make NO attempt to advance.

In FED, there is no such protection, and can be put out if they overrun first on a BOB.

True. But in OBR, if the BR gets a BOB, trots down to 1B, stops, and then steps past the bag, he hasn't overrun. He has simply walked off the bag and is liable to be tagged out. I admit that if he kept walking past the bag and then returned, I'd consider that an "overrun" (or an "overwalk"). It's a HTBT. But the BR has no automatic protection simply because his physical position is somewhere down the 1B line.