Caught in mid thought, before she even had a chance, an arm wrapped around her from behind.

It's obviously incorrect grammatically but I like the way it reads. Any suggestions?

Maybe...

“While caught in mid thought, she didn’t even have a chance to react as an arm wrapped around her from behind.”

As she pondered (this word may not be appropriate depending on what's going on. "lost herself in thought"?), an arm suddenly wrapped around her from behind before she could even protest.

I like both of those options. Thank you both

You're very welcome.

Hello sly:

I like the way YOU wrote it. I never did like rules.

excon