Of coarse I ignored the gunman. You said that if the 2 in front failed, then they'd open fire. I was going to wait until something actually happened to react. Reacting to a plan that I don't know IC would be metagamming.
And no, it wasn't like an auto hit. I payed close attention to the shield keeping me from jumping a certain height, and the guards blocking every angle. However, if there is something where there is no solution possible, that's godmodding. Even your guards can't legally have no holes in their formula, and thus I exploited one of them. To be fair, you didn't block the area in between their heads.