vspeed = 0;
hspeed = 0;
gravity = 0;
x = xprevious;
y = yprevious;
alarm[1] = 15;
if (instance_exists(obj_shaker))
{
    with (obj_shaker)
        instance_destroy();
}
snd_play(snd_noise);
global.hshake = 3;
global.shakespeed = 2;
global.vshake = 0;
instance_create(0, 0, obj_shaker);
if (scr_monstersum() == 1)
    alarm[1] = 4;