If ya got the money the combat stick is very nice, yup thats a spike alright, it's caused by a dirty pot which makes the puter think it just saw and infinite amount of resistance instead of say 500 ohms, so your moving the stick its approaching 499 ohms then zoom infinite resistance then back to say 525 ohms, thats why it jumps on ya, replacing is always better than cleaning pots if ya can, but if a new stick is in your future you won't be sorry!