Following Garen's lead:
(Click for a bigger version. No need to squint!)
I'm Kelvin Green. I draw, I write, I am physically grotesque, and my hair is stupid.
In Power Man and Iron Fist #79, a comic from the March of 1982 (and thus one that outlives both the blaxploitation and kung-fu fads that spawned the characters by a number of years), the titular twosome run into a race of robot-like beings that trundle about (because they have wheels in place of legs) shooting lasers at people while proclaiming that "YOU WILL BE INCINERATED!" 
It turns out that the "shop" is in fact a time machine merely disguised as a place of business, and that the owner and pilot, Professor Justin Alphonse Gamble, is a rogue member of the Time Variance Authority, a group that oversees and fixes problems in the timeline.