Same deal with my quad. It's a repeat offender and every time I become "aware" of it I know I'm in for a ping very bloody soon.Eh, obviously I'm no professional athlete, but as someone who has pinged the string on both legs a number of times playing local footy, I know what they mean by that.
It's kinda hard to explain, but awareness does it well, and I'd be interested to know if others who have torn hammies before have felt the same. For me it was a feeling that something wasn't quite right, but it wasn't necessarily tight either.
When I was less knowledgeable and after I'd only done it once, I felt the 'awareness' at training, but kept training because I thought I was on the verge of getting dropped from the 1s, kept training and sue enough it went about 15 minutes later. Being the adaptable creature I am, every time I got that feeling again after that, which has been a number of times, I eased off.
Take it with some salt or whatever as an amateur sporting experience, but I personally understand the use of that term.