There's always a chance you might get injured lifting. Over the years while training chest and shoulders I have dislocated my shoulder doing db presses, I have strained my pec on hammer inclines, I have strained my shoulders on cybex press machines, I have tweaked my pec and bicep on the smith machine doin inclines, I have strained my bicep doing traditional flat benches.
Today I just don't get crazy. If I feel even slighly compromised I either skip the movement, change it up or call it an early day.
For example 2 weeks ago training chest I used a hammer plate-loaded incline and had 8 plates loaded. I hit the 6th rep, it didn't feel right and I stopped. Monday I trained chest (national chest day) and did the same hammer inclines again with 8 plates and put up 24 reps no problem. Point is you never know exactly how your body is gonna react.