Exercise 1 is a classic, dreamed up by Monical Percival in the ’90s before crosses were much in use. If you follow the Handler Line, you’ll end up sending your dog ahead over jumps and doing land-side front or blind crosse as you move laterally to send him to the next jump. It’s great practice for perfecting crosses. Btw, you can also do the whole exercise using rear crosses. Pick your poison and have fun! Exericse 2 is the same idea.