Unusual rose sucker
I saw a rose sucker from a commercially grown rose bush that has grown to five feet in height within three months. It is tree-like, with no leaves or branches up the trunk, which is at least two inches in diameter. The trunk is covered in thick, nodule-based thorns, one on top of the other, almost reptilian-like in appearance. The foliage is a canopy at the top, spreading out in a four foot diameter.
It is clearly in the rose family, but like nothing I've ever seen. Its roots are so strong that they have pierced the bottom of the plastic container, rendering the pot unmovable without some serious spading.
The initial bare root was for a rosh bush, not a standard rose. The gardener who owns it has been growing roses for decades and has never seen anything like it before, either.
Any ideas what this would be?