SKIPPING CLASS & SHOOTING POOL on Bloor Street with > KOTYK , Leonard & Alec ....I applied the physics pronciple of light ...The ANGLE of INCIDENCE = The Angle of REFLECTION ...I would run a compact mirror along the cushion [ rail ] until I could see the OBJECT ball when viewed through the CUE BALL ..The shoot at the mirror image & I would always hit the Object ball ..When I didn't have the mirror > I would measure the distance the ball was from the rail , using the cue stick { PRINCIPLE > Object appears the same ditance behind mirror as it does in front } ..Then hold the cue stick perpendicular to the rail & view the cue ball from my mark on the stick & make a spit mark on the rail ..Which I then shoot for & hit my object ball...By accident I would also learn the effects of spin on the cue ball ...I still don't know how SPIN relates to LIGHT B ? CLUE ME IN > SOMEONE /ANYONE ?