First memorable one? I was 3. Took a mad ride on a horse named Snort when he jerked the reins out of my dads hands while pop was leading the horse around. Snort saw a group of other ranch horses being driven to another pasture by the hired help and he thought it best to be with them. Sucker ran down the drive to the dirt rode and took a hard right and started the sprint for his buddies when he realized there was something flailing around on the saddle (me with a death grip on the horn) and stopped just long enough for me to bail off into the weeds as he gave me a little shoulder toss to get me moving.
