Mentally, Marv was sighing. He'd gotten the story out of Dr. Saunders, and while he was glad this wasn't a situation where he was going to have to kill some people, it was definitely not a situation he particularly liked. He wasn't sure why someone would volunteer for something like this, but because she was a volunteer, he had no right to screw with their operation.
Still. He wanted to help...and really, if Topher never got his equipment back then they would have to let Echo develop naturally, unless they wanted to follow her around and make sure she didn't get herself hurt. Marv might not have minded it, but he doubted most normal people would want to do that. "Well." He gave it another moment's thought before continuing. "Y'know what I do when I got somethin' I wanna remember? I try to think about how I felt at the time, or match it up with a smell. An' if there's somethin' goin' on that I wanna remember, I try to put it in a little song. Sounds kinda silly, but it works."