If the demo is somewhat casual I fill in the blanks with "Aaany moment now..."
However, if it is anything more serious a "let's give it some time to work" followed by "we're working on optimizations" does the job, haha.
Now, if something straight up does not work as intended I bring it to notice and make sure to fix it before the next demo/meeting. People are much more forgiving when you own the error and don't try to hide it.
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If the demo is somewhat casual I fill in the blanks with "Aaany moment now..."
However, if it is anything more serious a "let's give it some time to work" followed by "we're working on optimizations" does the job, haha.
Now, if something straight up does not work as intended I bring it to notice and make sure to fix it before the next demo/meeting. People are much more forgiving when you own the error and don't try to hide it.