That this child - and Obi-Wan has trouble thinking of anyone under his own age as anything but a child anymore; side effect of being an old man - recognizes him somehow is all too obvious. The kid is too young to have remembered him from before the... well, from before.

How odd, then.

"The Force does sometimes have a mind of its own." He turns then, and reaches into his saddlebags. Upon handing the kid a full canteen of water, he spoke. "You know me, but I'm at a disadvantage."

He straightens the saddlebag and gives his loyal (and sometimes a little stubborn) mount a gentle pat. "Don't drink that too fast."