If you use the deleted scene with all the hand signals, will you use subtitles (for the hand signals)?
If you use it you could also make Obi-Wan and Anakin upset at some of the signals--for example, you could use Obi-Wan's "NOOOOOOO!!!" and Anakin's "I hate you" or some other lines (and after the Obi-Wan NOOOOO, you could have an "oops!")
You could also drag it out by making them repeat some hand signals several times and make "Steve" Grievous look somewhat incompetent as he stands by doing nothing.
Not sure how funny this would be or if it would work with the footage from the scene, but what the heck.