His condensed history of wallrides is a bit general. Natas had the September 1984 Thrasher cover doing a wall ride of some sort and claims that Dressen learned them, independently, at the same time. Natas also has a few clips in Future Primitive (1985) wallriding from flat and another "cave man" style while Jesse Martinez does some wall walks. So '85 was when it started to trickle down to the general skate community. Natas's '88 Thrasher interview introduced the idea of "wallies" (but did not show a sequence) and the opening scene of Sick Boys is the first video I had seen it in, and remains the ideal example.
Another issue is the generous labeling of "wall ride" in the sequences. The Natas sequence is more of a bank fly out, with the "wall" or "bank" taking the form of a perfect, albeit, tightly transitioned brick quarter pipe. And pole-jams, although similar, are not wallrides and clearly not "wallies", especially if you ride all the way through it. I may even hesitate to call the Mariano sequence a pole-jam as it's more of a roll up 50-50.