The ritual: check them at mid with 5MK, confirm nothing, and store. You are not trying to win the round here. You are teaching them that walking forward costs money, so that in thirty seconds they stop walking forward, and then the round is yours to win somewhere else.

2MK is the honest one — plus on block, cancels into store, and it asks the opponent a question they have to answer every single time. The answer is usually wrong. Climbing is mostly refusing to press a button you already know is minus, and letting the other player press theirs.