This IL was destroyed during Destroy Individual Levels December (official) a.k.a. DILD(o).

Getting a Rhino is explained here: https://www.speedrun.com/gtaiii/runs/yvlj5poz. The idea is similar to the one in Pump-Action Pimp, but here it has an additional benefit: if the van explodes fast enough (before the passenger gets out), then we skip a 2.5 second wait.