Welll... Vader got tossed into the lava because he ignored the fact that the difference in elevations gave Kenobi a +2 dex and +2 str advantage (well... according to the DM...)
And then later... welll. it just got worse.

But assuming that this bike is "more metal than man" and nice metal to boot, I'm willing to call it "all good"

oh, god, I'm SUCH a NERD!!!!