Spike the punch is to add alcohol.
Spike the football is what American football players often do after scoring a touchdown
(throwing the ball hard at the ground).
The man here did the second (throwing the football into the punch) rather than the first.
Like driving a spike into the ground, they throw the ball hard at the ground in exultation for scoring.
Back to the cartoon, he spiked the football not the punch. The cartoon is cute but if you analyze it, it doesn't make sense.