  We interpret a construction of geometric realisation by [Besser], [Grayson],
and [Drinfeld] of a simplicial set as constructing a space of maps from the
interval to a simplicial set, in a certain formal sense, reminiscent of the
Skorokhod space of semi-continuous functions; in particular, we show the
geometric realisation functor factors through an endofunctor of a certain
category. Our interpretation clarifies the explanation of [Drinfeld] "why
geometric realization commutes with Cartesian products and why the geometric
realization of a simplicial set [...] is equipped with an action of the group
of orientation preserving homeomorphisms of the segment [0,1]".
