Callum Wilson rose from the bench to spare Bournemouth's blushes after they chucked away a two-goal lead against Championship Blackburn.
The striker rose highest in the fourth minute of stoppage time to head home Marc Pugh's corner as Eddie Howe's team booked their spot in round four.
Bournemouth were cruising and comfortable at two-up after Junior Stanislas had ended six months of injury hell with a thumping volley and Jordon Ibe converted from the spot.
Callum Wilson rose from the bench to spare Bournemouth's blushes against Blackburn
MATCH FACTS
AFC Bournemouth: Boruc; Francis (c), Simpson, Mings, A Smith; Ibe, L Cook, Lerma, Stanislas (Pugh 69); Defoe (Wilson 73), Mousset (King 69)
Substitutes not used: Travers (GK); Ake, Dobre, Ofoborh
Manager: Eddie Howe
Scorers: Stanislas 14; Ibe pen 58; Wilson 90+4
Booked: Mings
Blackburn Rovers: Raya; Nyambe, Lenihan, Williams, Bell; Rodwell (Reed 59); Brereton (Travis 82), Conway (c), Rothwell, Palmer (Butterworth 64); Armstrong
Substitutes not used: Leutwiler (GK); Nuttall, Downing, Tomlinson
Manager: Tony Mowbray
Scorers: Conway 63; Armstrong pen 72 Booked: Lenihan
Sent off: Williams 90+2
Referee: Simon Hooper (Wiltshire)
But the reality was that Bournemouth should have led by four or five and those wasted opportunities came back to bite them as Blackburn launched a most unlikely comeback.