I have by accident once, though its nothing compared to galloping round with herds of cows! Was galloping across a field in a group, i was on a big ground eating 'oss and so were most of the others, just one girl on a sec a. Galloping along when i saw a little brown Welsh nose creeping up along side. Thought 'bloomin eck, he's keeping up rather well'
Stupid phone posting before id done. But yeah, little brown nose creeping up alongside, we carried on to the end of the field thinking little brown pony was a speed demon only to stop and realise he was only that fast as he'd ditched his weight (rider) at the start of the field and was loose the whole time. Oops.