My experience suggests that with limited time constraints players use a few openings and get to know them very well. Usually when im playing some one who is making me wonder if they are legit or not ( and hasnt beaten me ) is if i can hold out long enough they will make a mistake and it is sometimes a complete blunder. Suggesting they are now in an unknown part of their game and begin to become uncomfortable. Like some of the greatest fighters in sports. The ones that come out swinging and win in the first round. But if u can withstand the onslaught they will gas and u can jab them to death later on. Lol. ( not literally ).
Well, this is a 800 RATED TRAP https://youtu.be/FcNeEapxr0w Although you might already know the cambridge springs trap.