-rideatigerandfindithardtogetoff;getintoapositionfromwhichthereisnoretiring;have[hold]awolfbytheears;Hewhoridesatigerfindsitdifficulttodismount--tohavenowaytobackdown.;irrevocablycommitted;likeridingonatiger--afraidtogoonandunabletogetdown;Onceyougetonthetiger'sback,it'shardtogetoffagain.