"Am I alright?" The man watches you with narrowed eyes. "Of course I'm not alright! I'm leaving. Do not follow me. You or those... White creatures."

Uh-oh... Looks like your memory charm has failed you. It's not an easy charm to perfect, you might want to try it again before...

"I also have a stick. See?" The man grabs one from the ground, stands up and backs away slowly from you. "You're not the only one who can make those white creatures appear. I'll send mine after you."

Oh dear. Better try that memory charm one more time before the man leaves the clearing and is reunited with the dementor again.

Focus now.