remember this is only one of many studies that show this effect. i must say, the class was more about me learning the right way of training a dog than anything else. only the most clever students were able to complete the challenge with a 100% success rate. it spun high, and he jumped up to catch it. do not confuse typical every day conditions with safe conditions. check out what band that you usually put on to get hints. can't get enough it's so good. 