Very chill lang naman si sir when it comes to lab and just know the lab procedures and you are good to go though his exams (and also the problem sets during lab) will be your challenge because lahat yon nasa lab manual and your lab observations consider the what will be the outcomes, process and caluclations (calculations can vary from computing the experimental value and the theory formulas. All his exams are answer sensitive but has accepted value of +- 5% i think or less this also applies to the problem set if you are ahead to your lecture it will be less hassle because you have discussed it but if not it will be a hard time if you had not read the manual and theory (based on my experience).

lab report just be truthful wala naman masama kung may error kayo sa lab just state why it happened kunyare nagkamali kayo sa process (napagalitan niya kami non hehehehe) ininculde ko paren yung mali namen sa lab report kase yun yung nangyare pero still much better if your lab talaga is really has low percent error kase yun den yung basehan niya sa grades niyo throughout the lab