Advantage Gained Illegally
(a) End A1 goes 5 yards downfield and stops. Wide receiver A2 jumps on his
back and catches a pass; or (b) B1 steps on the back of snapper A1 immediately
after the snap as he propels himself into the air to block a punt; or (c) B1
jumps on B2's shoulders in an effort to block a field-goal attempt.
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Ruling: A personal foul in (a), (b), and (c). In all cases, and advantage has
been gained illegally.(9.4.3E)Casebook