Consult your printer’s manual or check any on-printer graphics to learn whether to place paper with the already-printed side up or down. For most printers, the printed side goes up.

Mugi Yamamoto created the Stack, an inkjet printer that eats its way down a stack of paper, swallowing each piece underneath, printing it, and depositing it on top of the machine. Image: Mugi Yamamoto ...

You're more likely to have paper jams, since the first pass through the printer introduces some curling in the paper. Even slightly curled paper will increase the chances of a paper misfeed.

The explanation in his own words: What they were doing was putting these fliers in the printer as printer paper, and printing out a blank word document a certain number of times.