OK, this one requires a little BG info. I play an XBOX game in which you gather resources by launching probes (like Cassini or Galileo) at planets. Rather than just launching blind, you scan the planet, and the controller vibrates when you hover over a significant cache of resources. Sometimes there are caches that aren't big enough to set off the controller. All this leading up to:
"No vibration, no probe."
Boyfriend just looked at me for a significant second and then cracked up laughing.