A person is performing a rollerblading trick as other people skate and run nearby .
We doubt that a pro rollerblader does a trick as other people do things nearby .
We doubt that a pro rollerblader does a trick as other people do things nearby .
It is probably the case that a pro rollerblader does a trick as other people do things nearby .
A pro rollerblader does a trick as other people do things nearby .