Limit Break Dancing
Oh wow. I love this house rule. Consider this stolen!A DM in one of the games I am playing allows us to drink a potion of healing as a bonus action and you roll the 2d4+2 as normal. But if you take a full action to drink it (or drink it out of combat), you get the full 10 hit points back. His explanation being that quickly drinking a potion is going to be tricky and you may spill/dribble and not get the full benefit. I think he took this (in whole or in part) from Critical Role.