Anthony and Negriss exchanged glances and immediately gestured for everyone to enter the rift first. Negriss did it out of a wicked sense of humor, wanting to jump out unexpectedly later and give Old Immortal a good scare.
Anthony, on the other hand, simply wanted to play it safe, as they didn't know who His Majesty's enemy was. Their sudden appearance on the battlefield could easily distract His Majesty, and being collateral damage was one thing, but if the enemy captured them as hostages, they weren't even sure if His Majesty would bother to save them.
Upon entering the spatial rift, they had intended to have Big Cat keep the rift open so they could exit at any moment, but once inside, they found that the environment was completely different from what they had expected.