Fortunately this ended well.
During Greg’s most recent driving lesson at Stepping Stone Farm, we over-adjusted some of the straps, apparently. As soon as Milton moved off, he started bucking in harness. Not a sight one wants to see. Coach Courtney gave swift but calmly-voiced instructions. Greg handled it. In retrospect, it was a few bucks over a short distance. Milton recovered immediately. The rest of us took a while longer.
Thank you for reading,
Katherine Walcott
Virtual Brush Box 
Glad it all worked out ok!
Glad all ended well!
Us also!