One thing I forgot: Xootr tires are VERY different from bike tires.

After I started cycling a lot, I had a couple of crashes on the Xootr, which I'd been riding for years. Couldn't figure out why I'd suddenly forgotten how to safely ride a Xootr.

Then it dawned on me -- I was trying to scooter over obstacles (like manhole covers) that the bike handles just fine but the Xootr doesn't. My brain wasn't making the switch from bike to Xootr.

Luckily my brain can now handle switching between these two very different vehicles, but I really had to pay attention for a while.