Yup. Any muscle tear will have massive bruising.
I was just making a point that what looks really bad may not be as bad as it seems, though I suspect with that weight load, he tore it good. :(
If it were me, I'd go to the doctor to see how serious it was.
I'd take the vitamin E to help prevent the scarring and depending on how bad the tear was I might increase the amount of E to 3000IU 3X a day, ( no need to say keep the protein levels high) I'd rest it and after 3 days I'd start to do some slow stretch movements to work the muscles, but no weights for at least 7 days or more depending on how serious the tear is.
Excerpt from
pectorial tear treatments
"Until recently, the diagnosis of pectoralis major muscle injury has been based on clinical assessment, the results of which may be misleading and are often affected by hemorrhage, tenderness, or spasm in the acute setting. Preoperative diagnosis of the location of the tear is important because tendon avulsion from the humerus is treated with prompt surgical repair, whereas muscle-tendon injuries are generally treated in a conservative manner (2,3). Early surgical repair allows avoidance of adhesions, muscle scarring, fibrosis, and atrophy and hastens the return of the athlete to competition. Chronic injury presents a greater surgical challenge due to retraction and scarring after complete avulsion of the tendon from the humerus (4) and hence is important to identify."
pectoralis major