Future Ted: [v.o.] Of course, I didn't tell those kids what really happened.
[When Barney returns to the alley behind MacLaren's, both Ted and Doug are laid out on the ground]
Barney: Okay, I'm all warmed up. Let's do this thing. What happened?
Marshall: [holding Doug's toupee] This happened.
Ted: Holy crap!
Future Ted: [v.o.] Yeah, turns out Uncle Marshall and his brothers did a little more than just roughhouse.