《零食虫》Bugsnax 33号怪怎么捕获

powerpyx这样写的
Bugsnax #33 – Waffstackarak
Location: Coming out of the sea
Spawn Time: After playing the hanging triangle between 4 AM and 11 AM
How to Catch: Best done by Tripwire. Scan its route ( :r3: + :r2: ) and tension it along its way

说的是4-11点打hanging triangle这时bugsnax就会出现。我猜hanging triangle应该是三角铁，可三角铁是什么道具，打到通关都没用过。
请问怎么使用三角铁呢？