sorry I do that
My mind goes blank and I forget everything about the topic
That's why you don't end with "Does anyone have questions? " It makes you seems like you weren't sure about the content, ending it with a "That concludes our presentation". Welp at least that's what my teacher said, personal opinion tho just go with "That concludes our presentation" so it's easier and you don't have to answer questions lol
If someone asks me when i am presenting something I hold grudge and asks ten qst when its their turn.
Being asked questions when giving a presentation is the worst