Change tunnels into uphill slopes and MANY people into MOST racers with 27 gears and you'll understand the frustrations of the racing singlespeed rider. Fixie riders know the same feeling when the group on the road suddenly decides it's time to change down and the fixie guy wants to put down the power.
Well, I do have my beloved 18 speed road bike and my very Japanese style local bike with single speed.
My point is, if you know you cannot go up that, PLEASE look back to check if anyone following you AND slow down and stop BEFORE you are on the slope.
Everyone of us know that if you are stopped during the slope, and I hope your lock is release fast enough.....