Comment by hdgvhicv

> That seems like the distance to go from having 100k people in front of you to having 100k people behind you

0 metres. Just turn round.

To pass within say 5m of someone you just need to set up shop at a busy train platform and wait. With 1000 people passing every 2 minutes it won’t take long to pass 100k (well presumably about 3 hours)