Prepare popcorn & set aside in an extra large bowl
In medium saucepan, combine sugar, water, corn syrup, vinegar & salt. Cook over high heat until it reaches 255 degrees (hard-ball stage)
Be patient- this can take a while - watch it closely & stir often.
Once it reaches 255 degrees, remove from heat & carefully stir in vanilla extract.
Carefully pour over popcorn & toss in your chocolate chips & Heath Toffee Bits
Stir, Stir, Stir until well incorporated - this will become more difficult as it starts to cool.
Once mixture is just cool enough that you can handle holding it for a short period of time- get your hands in there & start forming balls like you would with snow balls. It's going to get messy- it's okay. Work quickly- if it cools too much - it won't stick together to form the balls.
Place on cookie sheet lined with parchment to finish cooling.
Once cooled & hardened they are ready to serve.