X2, yikes. Force feeding/assist feeding is very, very hard (stressful) on snakes and it really isn't necessary unless the snake is close to starving itself (which your little guy is far from). Try other methods and ask Lynn how and what she was feeding. Don't be surprised if he refuses the next couple of feedings as he's still acclimating and from the stress of getting assist fed a feeder.
Added: Pinkie mice aren't anything for a baby boa/ball: are you trying actual hopper/adult mice with him?