Well, this has been bugging me & I need help..

See about two months ago I had the barn trainer tie Jolly in a stall.
He was passing around at the end of the rope for awhile...
So the trainer tied him closer to the wall (making the lead smaller in length)
& about fifteen mins into it he reared up & fell onto his back & snapped his halter off..
The trainers wife said he could have broken his neck-ever since then I'm afriad to have him tied.
I know he HAS to do it, but it makes me nervous & I know that doesnt help Jolly out at all.
So..how am I to tie him, without him hurting himself?