Remember that cryogenic liquids are under pressure. Always wear eye protection and insulated gloves when working with cryogenic liquids. Full face shields are preferred and are available in the beige safety cabinet on the experimental hall floor. Always wear closed, preferably leather shoes when handling cryogens.
Sandals are inappropriate footwear in any laboratory setting.
Call for help. This is why we have a buddy system. The buddy system is based on the observation that we have visual contact between two persons. It is probably a good idea to wear a water-proof apron as well, if there is danger of spilling the cryogenic material. Remember that all nitrogen supplied to the cleanroom for operation of almost all the equipment is transported to the cleanroom as a cryogenic liquid first.