Coventry scored twice in a thrilling finale to prevent 10-man Bournemouth moving back to the top of the Championship.
Leaders Fulham's draw at Preston earlier on Saturday opened the door for the Cherries and they looked set to take full advantage at 2-0 up with only five minutes remaining.
There was a degree of luck about Jaidon Anthony's opener on the stroke of half-time as his cross evaded everyone to find the far corner but he put in a fine centre for Philip Billing to prod home the second.
However, last man Jefferson Lerma received a straight red card for pulling down Sky Blues striker Matty Godden, who pulled one back 17 minutes later by firing home a loose ball in the box.