(W) Ron Zimmerman (A) Don Kramer & Various (CA) Don Kramer. Written by RON ZIMMERMAN Cover & pencils by DON KRAMER When the going gets really tough ... when a bad guy has gone through the rest of the FF like a knife through butter* Ben Grimm is the last line of defense. But what's it like to live inside his rock-hard skin? To endure the quiet insults from those who assume he has rocks inside his skull? And still be ready to put his butt on the line when* say* the Hulk goes on the rampage through Times Square? 48 PGS./MARVEL PG