Skunk-Ape: The invisible man may be invisible, but his invisible feet will still leave not-invisible footprints. Here are some tracks now!

(Webbed footprints in the dirt.)
Skunk-Ape: Hmm. No. These are Swamp-Creature's.

(Trail in the dirt.)
Skunk-Ape: Biomass.

(No sign of any footprints.)
Skunk-Ape: Henry Poltergeist.