Plymouth scored all four of their goals in the first half to beat Coventry and ease their relegation worries.
The hosts took the lead through Ashley Barnes who headed in from six yards after reacting quickest to a deflection off a Coventry defender.
Jamie Mackie added the second when he swept in a floated free-kick.
Alan Judge made it 3-0 with a cracking volley from the edge of the area before Marcel Seip headed in Chris Barker's clipped cross.
Plymouth boss Paul Sturrock: "I knew we had something like this in us," Sturrock said. "We have had home games where we have hit posts and bars and had goals disallowed.
"Something that I did not expect was to be 4-0 up at half-time. We have got a home game plan and the boys have worked very hard at it.
"Today all their hard work and endeavour paid off."
Coventry boss Chris Coleman: "I'd like to apologise to our fans for making the trip down to Plymouth, taking time off over the Easter weekend to watch that nonsense.
"Forget the second half. The game was done by then - it was over at half-time. It was an unacceptable performance by us.
"I am not happy about losing 4-0 or the fashion we conceded the goals."
Bookmark with:
What are these?