I...what?

I guess that's one way to fit an extra person on your ride

You think it could be an actual dead body? Because who would stop them and question it in such plain sight?

It's a training dummy for mma or wrestling

Ahh ok haha... Never saw one...

It's the perfect hiding spot for a dead body tho

Or... Kinky torture device for partners into latex

I think that's what it might be, an encasement device

See, kinky encasement device, which may or may not contain a person was totally what I was getting. Get outta here with your boring realistic explanation. MMA dummy, hmph.