Ya know... I've always wondered... Why is Belkar such a deadly little bastard? He's a halfling Ranger with two short swords dealing 1d4 + magic + Strength. Where does he get his industrial sized cans of whoop-ass? Plot neccesity?
Then you've never been witness to a power-gamer with a small character.
In 3.5E, small-sized melee characters are all about making lots of attacks, hitting often, and relying on the damage bonuses to pile up over multiple attacks.
For the sake of arguement, let's take a look at a Halfling 12th-Level Ranger, 1st Level Barbarian in the hands of a part-time power-gamer...
Strength base 16, +3 for leveling, +4 Belt of giant Strength, for a total Strength of 23 (+6). Let's make both of his small-sized shortswords +3, which is reasonable for a 13th Level character.
Ignoring anything else for now, he gets six attacks with attack bonuses of +21/+16/+11 (primary) and +21/+16/+11 (off-hand). His damage on each attack is 1d4+9 for his primary weapon, and 1d4+6 for the off-hand. If the ranger has his Favored Enemy maxed out for a particular target (like we assume Belkar does for humans), that provides an addition +6 damage to each attack... 1d4+15 and 1d4+12, respectively. That means a minimum of 87 points of damage on a full attack (maximum of 111), if he hits with all six attacks (as Belkar did in that on panel).
Note that doesn't any additional Strength bonus from raging.
Also note that without any magical assistance, a typical 20th Level Rogue will have roughly 90-100 hp on average.
Honestly, it's rather surprising Belkar didn't kill her outright with that first full attack.