Figure I'll chuck my $0.02 into this. Landmaster use by me, as Wolf, built a little confusion amongst the people I regularly play with. They assumed, rather silly-like, that if I hovered Wolf's Landmaster over their resurrect platform, they'd be knocked out of it early. Still invincible, but out of that platform.
While I allowed this confusion to reign (and it earned me easy kills, so why not? Heh heh), a friend who primarily uses Snake ended up getting into a battle with me on Mushroomy Kingdom. It needs to be said that I mainly use the Landmaster to lift people off-stage, rather than shoot or roll them away. It's my preferred kill method with the tank o' doom. Anyway, punchline.
On Mushroomy Kingdom, with him dropping back down from respawn immediately in an attempt to escape me, I was able to take three of his lives. With a single Landmaster. One.
I lol'd. I lol'd all over him. And then I lol'd a little more.