Incy Wincy Wave

I had a walk along the river, east of Tower Bridge, to look at some of the tall ships here for the river pageant on Sunday.
They can't go upriver beyond London Bridge, so they are gathering here, where the pageant will conclude.
Quite a few other people were doing the same, including this little spider who was waving at the ships.
I don't think they noticed him.

Have a look through the little magnifying glass to see him better.