Koolau's at Kualoa

I remember taking the saddle road trail on horseback several times up against the mountain and having my horse get fully spooked when boulders began falling off of the cliffs high above. It made such a huge sound crashing against the rocks all the way down. The horse bolted and I almost flew off because I had left him on a slack rein. Barely reeled him in and stopped him before going over the bars.