Evolution of the ratios between the los velocity dispersion (σ_los) and that predicted by MOND in isolation (σ_iso, left panel) and including the EFE (σ_EFE, right panel) for a simulated UDG launched on a radial orbit (e = 0.99) from 10 Mpc from the cluster centre. The UDG reaches pericentre around 4 Gyr. Its velocity dispersion decreases until pericentre passage (cf. σ_los/σ_iso), however without equilibrating with the EFE (cf. σ_los/σ_EFE), and it undergoes tidal heading after pericentre passage. Numbers in the legend indicate the simulation time and the distance from the cluster centre.