Maynard will keep hustling, and once out of range of the umbrella demon (or if it starts breaking free) will take out and drink the invisibility potion while quietly informing his companion.

Whew, that was dangerously close, and it seems we've got more foes coming near, not sure why they aren't attacking. I'm going to try out that invisibility potion, hopefully at least it lasts long enuogh to sneak past the foes near us. Just keep moving at the same pace we've been at and I'll follow as best I can.