Having slides that look great when skipped over, but don't stand up to any scrutiny if used as an actual slide.
"oh this was for the exec team when we presented this to them over 3 hours. since we only have 1 hour for you plebes, we’ll skip over it. but we already presented it to execs and they gave it the thumbs up. "
“i’ll have time for questions at the end, so hold on to that thought and if i haven’t answered it by the end...”
And don't leave time for questions at the end.
Prevents you from answering something you don't want to answer.