I had a two-child Burley when my kids were young (they are now 18 and 21). It hitched to the rear dropout, so the bike could fall over and leave the trailer upright, or vice versa. My husband once had 2 50-lb kids in the trailer (it was rated for 100 lb) and took a corner without slowing down. The trailer tipped and he didn't. Kids were well-protected and came out fine. Remember, a bike can lean to balance centripetal acceleration, a two-wheeled trailer cannot.