I jammed my thumb down on the throttle. The engine roared and snow kicked up behind us. I grinned behind my helmet. Heck yeah, this was going to be fun! The powerful snowmobile propelled us through the thick drifts. We rocked, skidded, and slid through the powder. My heart was pounding with excitement. At a tight turn, I yanked the handles to turn the skids. The heavy vehicle lurched, then lifted up on one skid. We began to tip. I felt my body start sliding, unwillingly, off