I really liked Diana's exercise in her blog where she had both Java and Miley work on coming out of and going into tunnels combined with turns. One thing about Lexi is that she sucks to tunnels, and loves blasting out. I thought it would be fun (and good practice!) to work on driving ahead, and paying attention.
I tend to love any exercise that can be turned into an "either/or" scenario!
You'll see that at about 1 minute I come to the epiphany that if I have to direct Lexi off of a straight line, I better find a way to get there (a shortcut--whether it's cutting corners, leaving her on a contact, etc...) or I can't give her information.