i have a mix of Colubrids including an MBK. i have been musked by each and everyone of them except for my Coxi (Thai Bamboo Ratsnake). even if u have experience w/ other snakes, many peeps are still be caught off guard by Colubrids b/c among other things:
1. they are micro-sized as babies
2. they are fast
3. they rattle their tails to mimic rattlesnakes
4. they multi-strike and it sounds scary
5. they don't just try to slither away, they thrash/are spastic
6. they musk!
anyways i agree w/ bits and pieces of what everyone has said so far but want to emphasize what Pretends2 said about size; i agree that Colubrids will calm down w/ size and age. my MBK was chill when i picked her outta the clutch from a show but went spaztic as soon as i got her home and warmed up. i wasn't necessarily trying to handle her but take a few pix. so i left her alone, fed her, cleaned up after her, let her grow and sprinkle in a few handling or photo sessions here and there. now that she has gone from a tiny baby eating pinkies to a nice sized pre-adult taking adult mice, she has confidence in herself and familiarity in me. so IMO u still have alotta time w/ your new baby MBK before handling sessions become pleasant.