I pulled the same move yesterday. I took a right, and was getting up to speed (pulling my 3 year-old son in the trailer, so it takes a while), and beginning to take the lane to go around cars parked on the right. I hear a horn and revving engines behind me back at the intersection, and glance around to see some jackass in an SUV swerving around someone else taking a right (the idiot couldn't wait for the car in front of them to wait for peds crossing the road, I guess). I decide not to take the lane just yet, but then the next few cars won't let me in, and while I'm waiting and slowing and approaching the parked cars, I forget to unclip and go over. Into traffic. Luckily, there's a gap, and I yell "SH*T" really loudly on the way down, so the car has plenty of time to stop. But for a second, it was looking bad.

After the fear wore off, I wished I had gotten up a lot faster and chased down the pinhead in the SUV.

Not five minutes later, I did it again. Stopping off at a playground, I unclip my right foot to pull the trailer up over a small curb, lose my balance, sort of hop/pogo/bounce three or four times while moving left, and then finally just go over. By that point I'd rotated so much that I fell right next to the window of the trailer. My son says, "Twice!" and starts laughing. Not much to do but laugh back.

Both times concerned people stopped and asked if I was okay, which was nice.