"Don't worry, I think I'll live." She followed him back to where she had been, standing a few feet away so as not to be in the way. Sure, he may be at Bobby's to learn, but she had no idea how good he really was; for all she knew, he might just end up accidentally throwing it backwards and hitting her. Her hands rested casually on her hips as she watched him take aim and throw. A faint snort escaped when the first knife landed in the dirt. The second one earned him a smirk, and she met his gaze.
"Not a damn thing." She reached into a pocket and pulled out a second set because, yes, Jo had brought more than one in case there had been someone who used a different weight. She, of course, could adjust to any weight as needed. "You can try these, if you really think it'll make that much of a difference." She walked towards him and held out the set, then moved past him after he'd taken it, retrieving the first two knives.
She moved back into place a few feet to the back and side of him, her dark gaze this time studying him as he got ready to throw the knives. After all, she couldn't teach him how to do it right unless she knew what it was he was doing wrong.