Original sentence

Problem

Possible revision

There was a ring at the door.

Starting with 'be' verb form

The door bell gurgled.

I went to open it, and saw my grandmother on the porch.

Uninteresting verbs 'went' and 'saw'

I opened the door and discovered my grandmother on the porch.

She was wearing stilettos and a black leather jacket.

Continuous tense 'was wearing' instead of simple past 'wore'

She teetered on stiletto heels and sported a blcak leather jacket.

It appeared that she had dyed her hair orange.

Noun phrase instead of strong verb: 'it appeared that''

Her hair erupted in orange spikes.

Behind her, a Harley-Davidson was being revved by a tattooed bikie

Passive verb form 'was being revved'

Behind her, a tattooed bikie revved his Hog.