Does anyone know how to bribe the instructor on this exam?
Sure, the standard practice in Poland is to have an envelope in your hands when you shake hands with him/her at the beginning. A normal bribe is around 1000zl for a guaranteed pass irrespective of exam performance.
Your name will be called out, you approach them , shake hands and transfer the envelope into their hands as you do so. Make sure that you firmly press the envelope into his hands, and a big smile will ensure that he/she understands the intent.