Emergency blip

Astrantia in garden, seems like an emergency blip.
In my lesson I had a new horse (only just, a 14.3 hh stocky compact cob) in my riding lesson, BB,  built like a tank, after 10 minutes the muscles in my upper arm were aching, his bit was adjusted & a flash strap was fitted to prevent him crossing his jaw, it worked a little, he was forward going, but very much on his forehand, it is a strange feeling. I must get a photo of him at some stage.