This is a giant version of a Featherlight (wish they had one as large as a Bronto or Giga)
So you’re walking one day, just minding your own business, when suddenly a Karkinos (a giant crab) appears, you scream and try to mount your Parasaur, but it’s too late, the Karkinos grabs it. Luckily you grabbed your shotgun and try firing at it. When suddenly something grabs you and lifts you into the air, you thrash and scream before landing in something’s nest. And whatever was carrying you, lies down.