don't allow jetpacking while downed

Content.Shared/Movement/Systems/SharedJetpackSystem.cs

@@ -4,6 +4,7 @@
 using Content.Shared.Movement.Components;
 using Content.Shared.Movement.Events;
 using Content.Shared.Popups;
+using Content.Shared.Standing;
 using Robust.Shared.Containers;
 using Robust.Shared.Physics.Components;
 using Robust.Shared.Physics.Systems;
@@ -20,6 +21,7 @@ public abstract class SharedJetpackSystem : EntitySystem
     [Dependency] private   readonly SharedPopupSystem _popup = default!;
     [Dependency] private   readonly SharedPhysicsSystem _physics = default!;
     [Dependency] private readonly ActionContainerSystem _actionContainer = default!;
+    [Dependency] private readonly StandingStateSystem _standing = default!;
 
     public override void Initialize()
     {
@@ -44,6 +46,10 @@ private void OnMapInit(EntityUid uid, JetpackComponent component, MapInitEvent a
 
     private void OnJetpackCanWeightlessMove(EntityUid uid, JetpackComponent component, ref CanWeightlessMoveEvent args)
     {
+        Container.TryGetContainingContainer(uid, out var container);
+        if (container?.Owner is { } owner && _standing.IsDown(owner))
+            return;
+
         args.CanMove = true;
     }
 
@@ -72,6 +78,9 @@ private void OnJetpackDropped(EntityUid uid, JetpackComponent component, Dropped
 
     private void OnJetpackUserCanWeightless(EntityUid uid, JetpackUserComponent component, ref CanWeightlessMoveEvent args)
     {
+        if (_standing.IsDown(uid))
+            return;
+
         args.CanMove = true;
     }