This is the schtick to jump and weave in a gunfight.
Ever wondered why Killers spend so much time doing cool headfirst jumps instead of looking for cover? David inspired and named this schtick.
With Kiss the Ground, you may make a jump of up to your Move as a part of any Guns action, even if that is a 1-shot action.
If your bonus movement gets you under cover or out of range of an area attack, you may lessen or avoid the effect of the blast - consider your movement to happen before the attack. Against pinpoint attacks, your movement is after the attack, not before.
A truly cinematic campaign may allow the Grenade Leap; when you dodge an explosion, you get to leap up to twice your Move by riding the blast.