1. #PLAYER CODE#
2. left = keyboard_check(ord("A"));
3. right = keyboard_check(ord("D"));
4. jump = keyboard_check_pressed(vk_space);
5.  
6.  
7. if facing != 0 image_xscale = facing;
8. else image_xscale = image_xscale;
9.  
10.  
11. facing = (right - left);
12.  
13. hsp = facing * walk_spd;
14.  
15.  
16.  
17. if(place_meeting(x+hsp,y,oWall))
18. {
19.   while(!place_meeting(x+sign(hsp),y,oWall))
20.   {
21.       x = x + sign(hsp);
22.   }
23.   hsp = 0;
24. }
25.  
26.  
27. if oShotgun.hasFired
28. {
29.         motion_add(-oShotgun.image_angle, oShotgun.backBlast);
30.         alarm[0] = 1;
31.         hasFired = false;
32. }
33.        
34. vsp += grv;
35. if(place_meeting(x,y+vsp,oWall))
36. {
37.         hasJumped = false;
38.   while(!place_meeting(x,y+vsp,oWall))
39.   {
40.       y = y + sign(vsp);
41.   }
42.   vsp = 0;
43. }
44.  
45. if jump && !hasJumped
46. {
47.         hasJumped = true;
48.         vsp -= jump_frc;
49. }
50.  
51.  
52.  
53. x += hsp;
54. y += vsp;
55.  
56. #GUN CODE#
57.  
58. x = oPlayer .x + 30;
59. y = oPlayer.y;
60.  
61.  
62. image_angle = point_direction(x,y,mouse_x,mouse_y);
63.  
64. if mouse_check_button_pressed(mb_left)
65. {
66.         hasFired = true;
67.         for(i = 0; i < bulletCount; i += 1)
68.         {
69.                 instance_create_layer(x,y,"Bullets",oBullet);
70.         }
71. }
72.  
73. #EXPLANATION#
74. Yes youre right I only want it to stop happening. So basically I wanna have a significant shotgun knockback and motion_add just seems the best way to do it.
75. BTW tjanks for all the help :).