Day the Sixth--Deep

Today I'm doing a Poetweet. It has to be complete in 140 characters (including spaces) and need not rhyme. Here's my stab at it:

Deep

The iceberg slid sinuously by,

silvery sculpted ribbons raising 

jagged crags to slice the sky.

Breathless, I watched it slide past. 

Or did it?

© 2015 by H. Linn Murphy

You can find out what a Poetweet is, here. There's even a contest you can enter.