Here's Nater with all four feet on the pedestal. This is one of his earliest successful mounts on the pedestal on a lead line. His training has currently progressed to the point where he oftentimes mounts the pedestal at liberty, gets very comfortable there and has to be coaxed off.
If you want to trick train your horse like this, do not start off with thinking that your horse is going to just put all four of his feet on the pedestal and stand there like Nater is doing. Yes, you may be lucky and have a horse that may be an exception to the rule. However, in training Nater, many small steps were taken, individual exercises practiced and checkpoints were made before Nater accomplished this pose. In fact, Nater was literally trained one foot at a time when he was being pedestal trained. He learned to put his first two feet on without too much trouble, the third foot seemed to be the hardest for him, and his fourth foot followed after some patient coaching.
The point of this article is broader than just training your horse to mount a pedestal. In any type of training for complex behaviors, small discrete tasks must be identified, taught and performed successfully long before expecting the end result. Use caution and common sense when training your horse and do not attempt too much too soon. Pay attention to your horse's body language and if your horse is not relaxed and receptive, then retreat to a prior task or level where your horse still feels good about himself and retains his confidence..