I used to be able to run a 5 minute mile. I can still run a 7 minute mile though. But this is for a short burst. I was a sprinter in high school. Used to be able to run 200m in 23 seconds. That's what....1600m in 184 seconds or a mile in 3 minutes 4 seconds which is approximately 19 mph... Granted, I couldn't keep that pace for a whole mile if I had to, but for short distances I could do it with no problem...

That being said, I'd hang out the side, get up to speed with the train and slow at my own pace once I let go of the train....