Beware the S curve! If the snake shapes its neck into a tight S shape shortly behind the head, it's in a good poture from which to strike. Also, if it seems bunched up and is moving it's head like it's tracking your movements, beware.
Generally, keep the snake out of range of your face, especially until you are familiar with each other. If you fail to see the strike coming, and a 6 footer gets you in the face, it's not going to be pretty.
If you get bit on the hand, or arm, it'll bleed, but it's not a big deal. As a boa owner, you will very probably get bitten at some point, so don't let that dominate your life. Just be safe and sensible and you'll have a great experience as a boa owner.
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2.1.0 Kidletts
1.0.1 Ball Python
0.0.1 Okeetee Corn
2.2.0 BCI
0.1.0 Cat (Ginger)
1.0.0 Pughuahua (Ranger)