I race down the concrete track, wind tearing by my face. Trees whiz by as I accelerate down the hill, gripping the handlebars tightly. A turn approaches from up ahead. I lean into it, and come out perfectly. I see a sign that says “Merge!” where another run joins into this one. Next I go through a tunnel, and several other signs warn “Slow Down!” The track narrows to a third of its old width, and I bounce off the wooden bumpers a couple times as I navigate the last bends.