Players have collision with each other, so standing in a doorway or narrow gap can physically prevent movement. Survivors body block to buy a teammate time; killers use the same principle to trap a survivor against geometry.
It is most powerful in tight spaces where there is no way around, and it is a normal part of team play in 4v1.
It cannot occur in a 1v1 duel, since only one survivor is present - but the underlying idea, using geometry to deny movement rather than outrunning someone, is exactly what a killer does when cutting off a loop.