Where are you if you're on tenter hooks?
Well, literally, you'd be like meat hung on hooks.
Hm, not very nice eh? But, then being on tenter hooks isn't. It's when you're very nervous waiting to hear a result like an exam or medical results or perhaps worst of all, whether you have been found guilty or not of murder!
This clip has a 30 second silence - it really keeps you on tenter hooks.