Or, how about when a seasoned nurse who has "many years of experience in this setting" establishes an IV, secures it and gives report to you that its a great working IV, but you find the IV in place with the needle still in the cath and tourniquet on... seriously!
Or, "I have great skills at starting IVs. I know I do, because I have done many butterflies before in my other job, and it must be like that." And after asking how many IVs this nurse has done... "Well, none really. It looks really easy." And when asked about how many times this person has done peripheral blood draws... "Well, I haven't worked in 5 years, but I did a few and did a good job." I did not belittle this individual, but reminded them that IV therapy and peripheral blood draws are nothing of the same.
Or, after 15 weeks of orientation (typically given 4-8), a nurse still looks puzzled when a doctor orders an accucheck on a known diabetic.
Just some things like this, that experienced nurses "should" feel comfortable with is challenging for preceptors. Not that there is room for improvement, because there certainly is, but that episodes like these mentioned above are mentally draining. It takes strong expereienced preceptors to hod on tight for the crazy ride at times without pulling hair out