Page 5 - Jake Gyllenhaal And 5 Other Actors Who Took Their Roles Too Far
4. Sylvester Stallone's Rocky Health
Sylvester Stallone seriously injured himself on numerous occasions whilst filming the Rocky movies. The actor insisted on actually taking punches in order to make the action seem more realistic.
The result? Stallone has, according to StyleBlazer, heart problems as a result of the injuries he suffered whilst filming Rocky IV.
Stallone suffered heart damage as a result of taking punches during filming.