You can do it :D
Seriously, I've never felted anything accidentally in all of the fiber I've dyed and spun and washed in the last four months (about 4 lbs. of fiber total), and I'm uh, generally pretty accident-prone when it comes to trying new things. All you need to do to set the twist is give it a nice warm bath with a capful of Eucalan then gently wring it and hang it to dry.
Do you have a digital camera? I'd love to see pictures! :D