Pictures, including a not-so-small flame:Incident: Lufthansa Cargo MD11 at Frankfurt on May 8th 2018, rejected takeoff due to engine failure
http://avherald.com/h?article=4b869d71&opt=0
A ground observer reported the #3 engine emitted a loud bang and a streak of flame
followed by less loud bangs and streaks of flames in regular intervals.
The aircraft slowed and stopped on the runway.
The right hand engine just "coughing":