i do a lot of training at work, and i am NOT good at it.... i tell everyone i train " i an a lousy trainer, i've been doing this for 30 years, and it is so second nature to me, i may blow right by something not realizing i didn't make it clear. so stop me and ask anything you need to, there are no stupid questions." when you tell someone they have to ask.. they don't seem to be afraid to interrupt.