Nice Sunday afternoon ride to Makapu'u Lookout Point. My Airhawk cruiser medium is flat again. 10 years old and the creases are starting to rupture. I just patched it up again. So I decided to get some PT in and ran most of it not realizing the entire path was uphill. Amazing views. Running down hill was the easy part. It's kind of like running on a treadmill while you have the full motion video playing on the screen except it's real and you don't have to listen to lousy mainstream gym music.