diff --git a/src/actor.rs b/src/actor.rs
index 7d3ddf4..548aca4 100644
--- a/src/actor.rs
+++ b/src/actor.rs
@@ -197,16 +197,20 @@ pub fn update_physics_actors(
 
 pub fn update_physics_lifeforms(
     time: Res<Time>,
-    mut query: Query<(&mut LifeForm, &mut Suit)>,
+    mut query: Query<(&mut LifeForm, &mut Suit, &Actor)>,
 ) {
     let d = time.delta_seconds();
-    for (mut lifeform, mut suit) in query.iter_mut() {
+    for (mut lifeform, mut suit, actor) in query.iter_mut() {
         if lifeform.adrenaline_jolt.abs() > 1e-3 {
             lifeform.adrenaline_jolt *= 0.99;
         }
         else {
             lifeform.adrenaline_jolt = 0.0
         }
+        let speed = actor.v.length();
+        if speed > 1000.0 {
+            lifeform.adrenaline += 0.001;
+        }
         lifeform.adrenaline = (lifeform.adrenaline - 0.0001 + lifeform.adrenaline_jolt * 0.01).clamp(0.0, 1.0);
 
         let mut oxygen_drain = nature::OXY_S;