How to handle the particular situation when mind goes blank during a presentation? Does anyone experience a situation of blank mind during their presentation?

I had a presentation in last month in USA. My presentation was going very well, probably due to enough practice, but during the presentation my mind suddenly went blank at a point. The situation became so worse that I could not even complete my sentence. The sentence was actually:


  The reason could be due to the  fact that stronger events have higher increasing rates.


The word "higher" didn't come to my mind and suddenly my mind went blank. So I just repeated 2-3 times "stronger events have.... have... stronger events have..." and finally stopped saying. Though few other words like "rapid, more or larger" were coming to my mind to complete the sentence, but the appropriate word "higher" or any similar word did not come. Moreover, I was telling this sentence from my mind completely, so I could not take help from my slides also. Finally I changed my sentence in a different way: 


  The reason could be due to the  fact that the rate of stronger events increases more rapidly compare to weaker events. 


It again surprised me that I could not even able to remind the word "higher" until I heard the same word in my next presenter's talk. This is not the first time, but not often. 

So I am wondering does it happen due to some particular lacks in me  that I need to develop? e.g., I am not a native English speaker. I am also wondering the proper way to handle similar situations when you don't find a suitable word to complete your sentence just because mind goes blank?
You may be experiencing what is called "mind blanks".

Before I answer, remember that every individual is unique and many factors could be the cause of the mind blanks you are experiencing.


It may be fatigue, let's say you may have been doing your presentation for already half an hour, and it is natural, if you aren't too passionate about your subject, to get tired or have your brain pull the plug for a brief moment, as random thoughts run through your head.
To remedy this, I personally try to get a coffee/espresso half an hour before doing a presentation. Caffeine can help connections between those gray cells.
You may get distracted, sometimes when looking through the room, you may notice something about one of the people that sets you off and it completely shatters your concentration, and trying to get back to your topic can be challenging.
Whenever that happens, try going a step or two backwards, ask yourself "what did I say before I lose track of my speech?", it's okay to start over from a previous sentence and it will also reduce your stuttering or "uhhh"-ing.
Lack of self confidence may also be a factor of disruption in your speeches. Thoughts rushing through your head may interrupt your speech and before you know it you focus on that one point, making you feel like your short-term memory completely failed registering what you were just saying.
Fear and feeling exposed can completely freeze some people.
Make sure to remain structured in your presentations, if you happen to use your slides to help yourself, remember that slide unicity is crucial, one slide should contain one and only one message. It'll be better for your audience and for yourself. Audience often forgets anything you had said 30s earlier if you deliver a poor presentation.


All that being said, my personal experience has taught me this :

One thing/trick I noticed that is crucial to a "perfectly" fluid presentation, is to be completely passionate about your subject. Whenever I knew my topic by heart, and was wholeheartedly implied in it, I would actually have a hard time to remain concise and synthetic, simply because I knew so much about the subject that I wanted to explain every single aspect and each of these aspects would also pull another string of 10 micro-subjects.

Unfortunately, in corporate environments, you don't always choose your topic and it can be hard feeling implied and dedicated in it.

If it happens again, try to relax, take it slow, I suggest to not put pressure on yourself as it will only make things worse. Another crippling event that happens along these mind blanks is caring about what people think, so be aware of that as well.

Now to handle this situation towards your audience, do not hesitate to apologize or even ask somebody in the room what you were saying just before, that way you might even be able to add a touch of humor behind this and be like "just making sure everyone's still with me". This is a common joke amongst teachers.