When Marco came to, he definitely knew he wasn't dreaming. If anything, he was having a nightmare. Because he wasn't the one telling his nose to sniff after that sent, or telling his legs to run, or his tail to wag. And he hadn't just lost control of the dog's instincts, because not only would that have still been him, Marco was much too familiar with the dog morph to do that .

There was someone else controlling his body.

And for Marco, that could only ever mean one thing - Yeerk. Inside his mind, Marco screamed, bombarding Sakura with terror and panic. He didn't even register what it was that he was screaming, his terrified ranting coming across more like a mess of half-sensical messages of no and get out.

Everything he knew told him that it was futile, but Marco still tried to frantically wrestle back control of his body.