Single-panel comics are a tough game to make a go of it in — especially if you’re going for something more, or at least other, than a quick laugh — but in his second self-published collection of them, the just-released One Minute To Wonderland, Denver-based cartoonist Karl Christian Krumpholz builds on the strong foundation he established in his previous go-’round, The City Was Never Going To Let Go, and manages to do something quietly extraordinary : breathe real depth, character, and dimension into people and situations we meet for only the briefest of moments.

Not that you wouldn’t be well-advised to spend at least a bit of time lingering over his expressive, intuitively-intricate illustrations, mind you : already well-established as arguably the definitive delineator of the modern socio-economic urban landscape in sequential form, Krumpholz is fast learning to translate those skills into “one-off” drawings — all of…