Saw a video couple years back of historical re-enactment of the assassination
Found if all the twenty odd conspirators tried to bum rush Caesar and stab him would have got into each others way and probably end up stabbing each other
Probably only 2 or 3 actually stabbed Caesar - rest would have later dipped their daggers in the blood as a symbol
If I remember correctly, Caesar sustained 22 stab wounds, only two of which would have been fatal.