As a special bonus OnomontoPOWia, I bring you the greatest sound effect panel of all time:

You may now stop reading super-hero comic books for all time, because no panel could ever be more awesome than this one. You have won the comics industry.
ETA: I didn't post this on a Friday because it's not one I discovered myself; it's been highlighted on a number of sites for a long time. But as the commenter pointed out, "Captain America, I command you to WANK!" is in fact why I brought it here. It may be the greatest command ever given by a super-villain.