User blog comment:Le Rottweiler/statkey/@comment-1496755-20150718104317/@comment-26005008-20150718105051

Good point about the cylinders. Petersen did mention including jetpacks into their project, but they failed to include them, probably due to time constraints. I’m less keen on crediting the hypothesis that it’s a backpack, to be honest.

The cube kind of reminds me of the Soul Cube from Doom 3, and being another id game there might be a connexion. I’d be surprised if the boots had nothing to do with velocity.