I may have misunderstood but...

this is what I think I heard. A reporter on the evening news was commenting on the dangerous misuse of parents' prescription drugs by children and teens. Obviously, not a laughing matter but this is what I heard as part of the report - "Over 60,000 kids, or four bus loads, have been injured by taking parent' prescription drugs." So my question is what kind of buses are they loading these kids on? Or, did I, because I wasn't paying close attention, misunderstand what they said. I've been trying to envision a bus that will hold 15,000 kids or guess what phrase I misheard. Four mushed toads doesn't seem any better. I would appreciate any other suggestions. In the meantime I will listen carefully to the late night news to see if the phrase is repeated.