It's kinda hard to take pic since I like to have both hands on handlebar at times like these !
But I started doing wheelies on an old spider bike back in late 60's way before mountain, bmx, and stunt bikes were even thought of !
Skateboards still had narrow steel wheels !
But could ride a wheelie around the block !
With Pedal Power !
I got into dirt bikes ( motorcycles ) in early 70' s and could wheelie them even better than bicycle !
Yes , I can still wheelie. Some bikes just need to be " talked into it " with a wee bit of persuation !