Don't feel bad or embarrassed if someone does stop you from waffling on. Take it as the colleague is helping to save u time and free up your schedule. 😃
Lol😅 I would like to witness that some day as in most cases people would rather save their own time and get distracted with other things or even just stare at the presentation yet lost in memory of other things.
It's even worse now with virtual meetings. People end up working on something else if the presentation is hard to follow.