MUSIC AS A WEAPON IV2 p.m., Riverfest Amphitheatre, $29.50-$49.50.
Here's a day for getting the lead out. This alternative-/heavy-/nu-metal and hard rock tour created by American metal giants Disturbed
is in full swing in its fourth installment. But this one's raised the bar a notch, with festival attractions including famous tattoo artists such as Oliver Peck, extreme sports exhibitions, interactive video game booths and a Harley Davidson display. Along with headliners Disturbed, other acts on the bill are Killswitch Engage, Lacuna Coil
and the festival's web site invites fans to select set list options by each of the four bands, which is a nice twist. A second stage will feature local Battle of the Bands winners Rusty Hook
and some lengthy-named act from Fort Smith, as well as Suicide Silence
, Crooked X
and Bury Your Dead
. Weather permitting, this day-long festival should bring the metal heads out in droves. A downside worthy of mention, however, is that lawn chairs won't be permitted. But the less bonfire fuel on hand, the better.